Problem: WannaCry attack is good business for cyber security firms SAN FRANCISCO For Kris Hagerman, chief executive of UK-based cyber security firm Sophos Group Plc , the past week could have been bad. The WannaCry "ransomware" attack hobbled some of its hospital customers in Britain's National Health Service, forcing them to turn away ambulances and cancel surgeries.

Based on the paragraph above can we conclude that "The NHS was targeted by a digital attack"? OPTIONS:
- Yes
- It's impossible to say
- No

A: Yes


Problem: In mathematics, an O*-algebra is an algebra of possibly unbounded operators defined on a dense subspace of a Hilbert space. The original examples were described by and , who studied some examples of O*-algebras, called Borchers algebras, arising from the Wightman axioms of quantum field theory. and began the systematic study of algebras of unbounded operators.

Based on the paragraph above can we conclude that "O*-algebra is an important math and you should learn it. "? OPTIONS:
- Yes
- It's impossible to say
- No

A: It's impossible to say


Problem: Once With Feeling<br>After the band played the crowd clapped politely. The band leader thought that they could do better. He raised his baton and conducted the song once more. He gestured to the musicians to play better and with more feeling. At the end of the second play the crowd went wild.

Based on the paragraph above can we conclude that "The crowd asked to hear the song again."? OPTIONS:
- Yes
- It's impossible to say
- No

A:
It's impossible to say