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.

[EX Q]: real madrid castilla is a spanish football team.
[EX A]: real madrid castilla

[EX Q]: hiromasa yamamoto (山本浩正, yamamoto hiromasa, born 5 june 1979) is a japanese professional athlete.
[EX A]: hiromasa yamamoto

[EX Q]: be careful with my heart is a philippine television drama series.
[EX A]:
be careful with my heart