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.

kurt julius isselbacher (september 12, 1925 july 18, 2019) was a german-born american physician and gastroenterologist.
kurt julius isselbacher

the corruption perceptions index is an index that shows how corrupt certain countries are.
corruption perceptions index

eileithyia (; ) was the goddess of childbirth and midwifery in greek mythology.
eileithyia