{"pair_id":"bem_tp_bomba_001","language":"bem","root":"bomb","root_gloss_1":"work","root_gloss_2":"get wet","bts_version":"3.2.1","frame":"infinitive","form_1":{"surface":"ukubomba","english":"to work the jobs","full_sentence":"Ukubomba incito.","tones":["L","L","L","L"],"tone_pattern":"all_low","root_tone":"L"},"form_2":{"surface":"ukubomba","english":"to get wet from the rain","full_sentence":"Ukubomba ne mfula.","tones":["L","L","L","L"],"tone_pattern":"all_low","root_tone":"L"},"contrast_type":"lexical_tone_on_root","note":"Segmentally identical in flat text. Tonal distinction present in speech: root -bomb- carries L for 'work' but H realization in certain tense contexts for 'get wet'. Minimal pair demonstrates flat text problem."}
{"pair_id":"bem_tp_bomba_002","language":"bem","root":"bomb","root_gloss_1":"work","root_gloss_2":"get wet","bts_version":"3.2.1","frame":"perfect_1sg","form_1":{"surface":"nimbomba","english":"I have worked","full_sentence":"Nimbomba.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","root_tone":"L"},"form_2":{"surface":"nimbomba","english":"I am wet","full_sentence":"Nimbomba.","tones":["H","L","H","L"],"tone_pattern":"HL_HL","root_tone":"H"},"contrast_type":"lexical_tonal_minimal_pair","note":"Written identically. In speech, 'I have worked' has spreading from SM giving HH-LL; 'I am wet' has H on root giving HL-HL. Only tone distinguishes meaning."}
{"pair_id":"bem_tp_bomba_003","language":"bem","root":"bomb","root_gloss_1":"work","root_gloss_2":"get wet","bts_version":"3.2.1","frame":"progressive_1sg","form_1":{"surface":"ndebomba","english":"I'm working","full_sentence":"Ndebomba.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","root_tone":"L"},"form_2":{"surface":"ndebomba","english":"I'm getting wet","full_sentence":"Ndebomba.","tones":["H","L","H","L"],"tone_pattern":"HL_HL","root_tone":"H"},"contrast_type":"lexical_tonal_minimal_pair","note":"Flat text identical. Tonal contrast on root distinguishes 'working' from 'getting wet' in progressive aspect."}
{"pair_id":"bem_tp_bomba_004","language":"bem","root":"bomb","root_gloss_1":"work","root_gloss_2":"get wet","bts_version":"3.2.1","frame":"future_negative_1sg","form_1":{"surface":"nshabombe","english":"I will not work","full_sentence":"Nshabombe.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","root_tone":"L"},"form_2":{"surface":"nshabombe","english":"I will not get wet","full_sentence":"Nshabombe.","tones":["H","L","H","L"],"tone_pattern":"HL_HL","root_tone":"H"},"contrast_type":"lexical_tonal_minimal_pair","note":"Future negative forms segmentally identical. Tone on root is the sole disambiguator between 'not work' and 'not get wet'."}
{"pair_id":"bem_tp_bomba_005","language":"bem","root":"bomb","root_gloss_1":"work","root_gloss_2":"get wet","bts_version":"3.2.1","frame":"negative_1sg","form_1":{"surface":"nshibomba","english":"I am not working","full_sentence":"Nshibomba.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","root_tone":"L"},"form_2":{"surface":"nshibomba","english":"I am not getting wet","full_sentence":"Nshibomba.","tones":["H","L","H","L"],"tone_pattern":"HL_HL","root_tone":"H"},"contrast_type":"lexical_tonal_minimal_pair","note":"Negative progressive pair. Segmentally identical; tonal pattern on root syllable carries the entire semantic distinction."}
{"pair_id":"bem_tp_bomba_006","language":"bem","root":"bomb","root_gloss":"work","bts_version":"3.2.1","frame":"declarative_vs_interrogative","form_1":{"surface":"balebomba","english":"they are working","full_sentence":"Balebomba.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","intonation":"declarative_falling"},"form_2":{"surface":"balebomba","english":"are they working?","full_sentence":"Balebomba?","tones":["H","H","L","H"],"tone_pattern":"HH_LH","intonation":"interrogative_rising"},"contrast_type":"sentence_type_tonal_contrast","note":"Same morphological form. Declarative has falling boundary tone; interrogative has rising boundary tone on final syllable. Flat text uses punctuation but models often miss prosodic realization."}
{"pair_id":"bem_tp_temwa_001","language":"bem","root":"temw","root_gloss":"love","bts_version":"3.2.1","frame":"progressive_3pl","form_1":{"surface":"baletemwena","english":"they love each other","full_sentence":"Baletemwena.","tones":["H","H","H","L","L"],"tone_pattern":"HHH_LL","root_tone":"H"},"form_2":{"surface":"baletemwena","english":"do they love each other?","full_sentence":"Baletemwena?","tones":["H","H","H","L","H"],"tone_pattern":"HHH_LH","intonation":"interrogative_rising"},"contrast_type":"sentence_type_tonal_contrast","note":"H-toned root -temw- triggers different spreading pattern than L-toned roots. Question form raises final boundary tone."}
{"pair_id":"bem_tp_fwaya_001","language":"bem","root":"fwai","root_gloss":"want","bts_version":"3.2.1","frame":"progressive_1sg","form_1":{"surface":"nalefwaya","english":"I want","full_sentence":"Nalefwaya.","tones":["H","H","L","L"],"tone_pattern":"HH_LL","root_tone":"L"},"form_2":{"surface":"nalefwaya","english":"do I want?","full_sentence":"Nalefwaya?","tones":["H","H","L","H"],"tone_pattern":"HH_LH","intonation":"interrogative_rising"},"contrast_type":"sentence_type_tonal_contrast","note":"Declarative vs interrogative contrast on same verb form. Final boundary tone is the disambiguator."}