instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
Which American country singer, the younger sister of singer Loretta Lynn, had 18 #1 country hits during the 1970s and 1980s, and is best known for a series of country-pop crossover hits including Don't It Make My Brown Eyes Blue?
answer:
crystal gayle


question:
What did Alfred Hormel invent?
answer:
spam


question:
Which of these is a famous work by Grant Wood?
answer:

american gothic