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.

the sunflower ("helianthus annuus") is a living annual plant in the family asteraceae, with a large flower head ("capitulum").
sunflower

caledonian stadium is a scottish football stadium.
caledonian stadium

surfing with the alien is the second album by instrumental rock solo artist joe satriani, released in 1987.
surfing with the alien