Input:

Swift crater is a crater on Mars's moon Deimos. It is about 3 km in diameter. Swift crater is named after Jonathan Swift, whose 1726 book "Gulliver's Travels" predicted the existence of two moons of Mars. Swift crater is one of two named features on Deimos, the other being Voltaire crater. On 10 July 2006, Mars Global Surveyor took an image of Deimos from 22985 km away showing Swift crater.

Sentence: The swift crater can be spotted through a telescope.

Output: It's impossible to say

Input:

Mappings is a first book of poems by Vikram Seth originally published by the Writers Workshop, Calcutta (now Kolkata), as a hand-set, hand-printed and hand-bound volume ("in Hardback or Flexiback") in 1980 or 1981 (the Flexiback edition copyright date is 1981). With the growth of Seth's reputation, the volume has been reprinted by mainstream publishers (ISBN ).

Sentence: Vikram Seth has published many books.

Output: It's impossible to say

Input:

Newington is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population was 12,943 at the 2010 census. The 2010 census showed a significant decrease after half the population was split off to the newly created Newington Forest CDP.

Sentence: Newington's population will decrease by 2020.

Output: It's impossible to say

Input:

Linguistics is the scientific study of language, and involves an analysis of language form, language meaning, and language in context. The earliest activities in the documentation and description of language have been attributed to the 4th century BCE Indian grammarian Panini, who wrote a formal description of the Sanskrit language in his "Astadhyayi ".

Sentence: An Indian grammarian described the Sanskrit language in the 4th century.

Output:
Yes