Use the database tables below to answer the following questions. 
-Which field in the TimeSheet table is a foreign key?
Definitions:
Common Human Response
A general or typical reaction exhibited by people when presented with similar stimuli or situations.
William James
A philosopher and psychologist who is considered a founder of American psychology, known for his work on pragmatism and the psychology of religious experience.
Must Die
A statement reflecting the inevitable mortality of living beings, emphasizing the certainty of death for all.
Fertilization
The process in which a sperm cell unites with an egg cell, leading to the formation of a zygote and the initiation of pregnancy.
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