Men in a martial arts competition aren't in a wrestling competition.
The question and answer are below.
Given the sentence "Two men go toe to toe in a martial arts competition." is it true that "There is a wrestling competition."?
no

We assume there is an entrance as sentence one refers to the underground transportation entrance.
The question and answer are below.
Given the sentence "Underground transportation entrance to oxford circus station." is it true that "There is an entrance."?
yes

If a group of runners are attending an event it means that the end is occupied.
The question and answer are below.

Given the sentence "A group of runners are attending an event." is it true that "The event is occupied."?
yes