Question:
russia ratified the updated treaty in 2004.

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:
russia ratified the amended treaty.

Question:
Kerry postpones visit to Israel in one week

What is a sentence that would be (on a scale from 0 to 5) a 2 out of 5 in terms of textual similarity to the above sentence?

Answer:
Kerry to visit Jordan, Israel-Palestinian peace on agenda

Question:
Steve Squyres, a Cornell University scientist, is principal investigator for the missions' science instruments.

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:
Squyres is principal investigator for the Athena payload - a collection of science instruments carted by each rover.