Question: What national guard prevented the person Hazel Bryan Massery is famous for shouting at from entering a school?
Sentence (from "Elizabeth Eckford"): Elizabeth Eckford (born October 4, 1941) is one of the Little Rock Nine, a group of African-American students who, in 1957, were the first black students ever to attend classes at Little Rock Central High School in Little Rock, Arkansas.
Relevant evidence: Yes