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.

Example Input: ford edge is a mid-size crossover vehicle.
Example Output: ford edge

Example Input: in 2013, esther peterson was inducted into the us department of labor's hall of honor.
Example Output: esther peterson

Example Input: leni robredo (born april 23, 1965) is a filipina lawyer and politician.
Example Output:
leni robredo