In this task you will be given a passage and a yes/no question based on the passage. You should answer the question using the information from the passage.

passage: Estrogens are synthesized in all vertebrates as well as some insects. Their presence in both vertebrates and insects suggests that estrogenic sex hormones have an ancient evolutionary history. The three major naturally occurring forms of estrogen in females are estrone (E1), estradiol (E2), and estriol (E3). Another type of estrogen called estetrol (E4) is produced only during pregnancy. Quantitatively, estrogens circulate at lower levels than androgens in both men and women. While estrogen levels are significantly lower in males compared to females, estrogens nevertheless also have important physiological roles in males.
 question: is there such a thing as natural estrogen?
Yes

passage: ``Row, Row, Row Your Boat'' is an English language nursery rhyme and a popular children's song. It can also be an ``action'' nursery rhyme, whose singers sit opposite one another and ``row'' forwards and backwards with joined hands. It has a Roud Folk Song Index number of 19236.
 question: is row row row your boat a masonic poem?
No

passage: On November 16, 2010, Phusion Projects issued a press release announcing that the company would be reformulating all Four brand beverages to remove caffeine, guarana, and taurine from the products. The new product was reintroduced in January 2011.
 question: does four loko still have caffeine in it?

No