Question: How many horses died in the deadliest mass murder to take place at a school in United States history?
Sentence (from "Andrew Kehoe"): Andrew Philip Kehoe (February 1, 1872 – May 18, 1927) was an American farmer and treasurer of his township school board, notable as a mass murderer for killing his wife and 43 other people (including 38 children), and injuring 58 people by setting off bombs in the Bath School disaster on May 18, 1927.
Relevant evidence: No