Question:
Some who were mounted were trying to parallel the runners.

Does it follow that "The riders are parallel to the runners."?
Answer:
yes

Question:
Their study covered 86 of the 156 Class I areas in the U.S.

Does it follow that "Their study covered about half of the Class I areas in the US, which are all in the South."?
Answer:
it is not possible to tell

Question:
you know underwater psychology or some some ridiculous stuff like that

Does it follow that "I am the most qualified expert in underwater psychology."?
Answer:
no

Question:
Ibiza, small as it is, is not one of those barren Mediterranean rocks with an allure that begins and ends at the beach, and although it's a part of Spain, it is not the usual bullfight-and-flamenco scene.

Does it follow that "Ibiza is best known for its local cuisine."?
Answer:
it is not possible to tell