The professional biker could be a woman and not a man.
The question and answer are below.
Given the sentence "A professional biker in a race." is it true that "A man is racing."?
it is not possible to tell

Children is meant to be child because A is singular. Bike is a short term for bicycle. Riding is the suffix form of rides.
The question and answer are below.
Can we conclude from "A children with a helmet riding his bicycle." that "A child rides a bike."?
Options:
- yes
- no
- it is not possible to tell
yes

A gum bubble is the same as a bubble with gum.
The question and answer are below.
Premise: "A young girl sporting a pink and brown shirt blows a bubble with gum."
Hypothesis: "A young girl is blowing a gum bubble."
Do we know that the hypothesis entailed by the premise?
yes