Read the following paragraph and determine if the hypothesis is true:

William Elden Bolcom (born May 26, 1938) is an American composer and pianist. He has received the Pulitzer Prize, the National Medal of Arts, a Grammy Award, the Detroit Music Award and was named 2007 Composer of the Year by Musical America. Bolcom taught composition at the University of Michigan from 1973–2008. He is married to mezzo-soprano Joan Morris.

Hypothesis: Bolcom started teaching composition at the University of Michigan in the summer of the year preceding 1794n
OPTIONS:
- Yes
- It's impossible to say
- No
It's impossible to say