Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Prostate Cancer ?
    ### Response:
    The prostate is the gland below a man's bladder that produces fluid for semen. Prostate cancer is common among older men. It is rare in men younger than 40. Risk factors for developing prostate cancer include being over 65 years of age, family history, and being African-American.
    