With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Helen Keller's teacher was also her lifelong companion.
text_B: Huang Zhun -LRB- born 19 June 1926 -RRB- is a Chinese composer .. Huang. Huang. Chinese. China. She was born in Suzhou , Jangsu Province , and studied composition with Xian Xinghai .. Suzhou. Suzhou. Xian Xinghai. Xian Xinghai. She performed as a mezzo-soprano from 1941 -- 42 , and then in 1949 took a position as composer and later music director for Shanghai Film Studio where she worked until 1987 .
not_related.