but their line was busy
but their line be busy
conj det:poss n cop adj
but their line was busy .
b ʌ t WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY l aɪ n WORD_BOUNDARY w ʌ z WORD_BOUNDARY b ɪ z i WORD_BOUNDARY
b u t WORD_BOUNDARY t h e i r WORD_BOUNDARY l i n e WORD_BOUNDARY w a s WORD_BOUNDARY b u s y WORD_BOUNDARY