Suppose Maya Angelou (April 4, 1928 – May 28, 2014) was an American poet, memoirist, and civil rights activist. She published seven autobiographies, three books of essays, several books of poetry, and is credited with a list of plays, movies, and television shows spanning over 50 years.
Can we infer that "Maya Angelou only wrote books of poetry."? Yes, no, or maybe?