Input:

Limnocharis flava (commonly known as yellow velvetleaf, sawah flower rush, sawah lettuce) is a species of aquatic flowering plant which is native to Mexico, Central America, South America, Cuba, Haiti and the Dominican Republic but widely naturalized in southern and southeastern Asia: India, Sri Lanka, Cambodia, Burma, Thailand, Vietnam, Indonesia, Malaysia and southern China (Guangdong, Yunnan).

Sentence: Limnocharis flava has been seen by Dan.

Output: It's impossible to say

Input:

OverBlood is a science fiction video game developed by Riverhillsoft and published by Electronic Arts for the PlayStation. It is considered one of the first survival horror games to make use of a fully three-dimensional virtual environment, second only to Riverhillsoft's own "Doctor Hauzer", a fully 3D survival horror game released for the 3DO in 1994.

Sentence: OverBlood is a science fiction video game developed by Riversidesoft and published by Electronic Arts.

Output: No

Input:

Dr. Edward Vivian Scobie (1918 14 November 1996) was a Dominican-born journalist, magazine publisher and historian. He is best known for his research into the black history of Western Europe and his 1972 seminal book "Black Britannia: A History of Blacks in Britain".

Sentence: DR. Scobie was most proud of his book "Black Britannia".

Output: It's impossible to say

Input:

The 2015 J&T Banka Prague Open was a professional tennis tournaments played on outdoor clay courts. It was the 6th edition of the tournament which was an International tournament on the 2015 WTA Tour. It took place at the Sparta Prague Tennis Club in Prague, Czech Republic, from 27 April to 2 May 2015. This was the event's first edition as a WTA International tournament.

Sentence: 2015 was the 6th year the tournament had been held

Output:
Yes