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:
the duke lemur center is an 85 acre sanctuary for several species of lemurs and lorises.
answer:
duke lemur center

question:
murray albert olmstead (september 4, 1926 november 16, 2015) was a canadian professional ice hockey left winger.
answer:
bert olmstead

question:
the 7 july 2005 london bombings (also called 7/7) were suicide bomb attacks aimed at london's public transport system during the morning rush hour.
answer:
7 july 2005 london bombings