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]: jena malone (born november 21, 1984, sparks, nevada) is an american actress.
[EX A]: jena malone

[EX Q]: the social democratic party of germany (german sozialdemokratische partei deutschlands or spd) is the oldest political party in germany that still exists, having been formed on 23 may 1863.
[EX A]: social democratic party of germany

[EX Q]: heybeliada is an island in sea of marmara in turkey.
[EX A]:
heybeliada