Input:

The Basilica Cistern (Turkish: "Yerebatan Sarnc "Cistern Sinking Into Ground"" ), is the largest of several hundred ancient cisterns that lie beneath the city of Istanbul (formerly Constantinople), Turkey. The cistern, located 500 ft southwest of the Hagia Sophia on the historical peninsula of Sarayburnu, was built in the 6th century during the reign of Byzantine Emperor Justinian I.

Sentence: There are 300 cisterns in Istanbul.

Output: It's impossible to say

Input:

Larry Martin Hagman (September 21, 1931 November 23, 2012) was an American film and television actor, director and producer best known for playing ruthless oil baron J.R. Ewing in the 1980s primetime television soap opera "Dallas" and befuddled astronaut Major Anthony "Tony" Nelson in the 1960s sitcom, "I Dream of Jeannie".

Sentence: Larry Hagman was a movie star.

Output: Yes

Input:

Walter Harris (born 1925) is a British author and broadcaster. He is the author of ten published novels, several volumes of poetry, numerous articles and spoken word recordings. Recordings of his interviews and broadcasts are held at the BBC Sound Archive and the British Library.

Sentence: Walter Harris isn't an author of any novels.

Output: No

Input:

The Warlock in Spite of Himself is a science fantasy novel by American author Christopher Stasheff, published in 1969. It is the first book in "Warlock of Gramarye" series. The title is a play on the title of Moliere's "Le Medecin malgre lui" ("The Doctor, in Spite of Himself").

Sentence: Christopher Stasheff was a warlock.

Output:
It's impossible to say