Question:
the treaty limits the number of aircraft, tanks and other non-nuclear heavy weapons around europe.

What is a sentence that would be (on a scale from 0 to 5) a 4 out of 5 in terms of textual similarity to the above sentence?

Answer:
the treaty limits the number of aircraft, tanks and other non-nuclear heavy weapons around europe and was first signed in 1990.

Question:
Russia, Ukraine foiled plot to kill Putin, report says

What is a sentence that would be (on a scale from 0 to 5) a 3 out of 5 in terms of textual similarity to the above sentence?

Answer:
Russian TV reports foiled attempt on Putin

Question:
Shots fired at German ambassador's residence in Athens

What is a sentence that would be (on a scale from 0 to 5) a 5 out of 5 in terms of textual similarity to the above sentence?

Answer:
German ambassador's Athens residence shot at