Input: 

On February 1, 1990, during a spacewalk, Alexander Serebrov dons an experimental flying armchair that had been delivered to Mir with Kvant 2. Unlike U.S. astronauts, who flew untethered flights with a similar device, the Soviet cosmonaut remains attached to the station with a safety tether, since there is no space shuttle to pick him up in case of an emergency.

Sentence: The armchair had a stereo.

Output: It's impossible to say


Input: 

This paper discusses marijuana, crack/cocaine, tranquilizers, hallucinogens, amphetamines, heroin, alcohol, nicotine and caffeine to provide a framework for the author's argument that the legalization of drugs can in no way be deemed as ethical or moral.

Sentence: The rightness or wrongness of mind altering substances is the topic

Output: Yes


Input: 

Banning ivory is the surest road to extinction for the African elephant, argue leaders in those countries.

Sentence: Statement contains less than about 28 words

Output: Yes


Input: 

For example, the fields of Western farmers feed the United States and many other parts of the world, and India's irrigation systems have enabled that country to be self-sufficient in food production since 1974. In addition, in many parts of the world dams have helped to remedy life-threatening problems such as poverty from lack of economic development, famine as a result of drought, devastation from floods, and continued disease from lack of potable water supplies.

Sentence: Farmers provide food to people 

Output: