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.

[Q]: regent's canal is a canal in england.
[A]: regent's canal


[Q]: leni robredo (born april 23, 1965) is a filipina lawyer and politician.
[A]: leni robredo


[Q]: the multituberculates were a group of rodent-like mammals which survived for about 120 million years – the second longest fossil history of any mammal line.
[A]:
multituberculate