Input:

Elizabeth "Long Liz" Stride (nee Gustafsdotter) (27 November 1843 30 September 1888) is believed to be a victim of the notorious unidentified serial killer called Jack the Ripper, who killed and mutilated several women in the Whitechapel area of London from late August to early November 1888.

Sentence: Elizabeth Stride was allegedly killed by Jack the Ripper

Output: Yes

Input:

This is a list of Japanese idols; a type of celebrity in Japan. The word "idol" is almost always used to refer to a young woman, although there a significant number of male idols. The following list includes both female and male idols as well as both solo idols and idol groups.

Sentence: The list only has Japanese celebrities on it.

Output: Yes

Input:

RBG Resources was a British public-limited firm based in London that was allegedly involved in a serious fraud worth close to 300 million (US$600 million). RBG Resources made $1.1 billion in sales in 2000. It was an affiliate of the United States based Allied Deals Inc., which was also involved in the fraud, and resulted in 14 people convicted or pleading guilty to related crimes.

Sentence: RBG Resources made $1.1 billion in sales in the year after 1998.

Output: It's impossible to say

Input:

Fan and Mortar Geysers are two geysers in the Upper Geyser Basin in Yellowstone National Park. For the past several decades, they have erupted in concert with one another and are generally talked about together. The records detailing these geysers' known eruptive history shows that they have been infrequent and irregular performers.

Sentence: Fan and Mortar Geysers are the most famous geysers in Yellowstone National Park

Output:
It's impossible to say