instruction:
Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
question:
eric s. raymond (often called esr; born 4 december 1957) is an american writer and computer programmer.
answer:
eric s. raymond


question:
he is more often called davy crockett.
answer:
davy crockett


question:
the parietal bones are bones that are part of the human skull.
answer:

parietal bone