R & A: A person welding metal could be a person welding a mask.
yes
Q: Given the sentence "A person with gloves and a welding mask is welding metal in a factory." is it true that "A person is welding a mask."?

R & A: You can prepare for races that are not charities or a charity.
it is not possible to tell
Q: Given the sentence "Young cyclists prepare for a race." is it true that "Young cyclist are racing for a charity."?

R & A: A man making cement risers does not imply that he making cement risers for a new apartment building.
it is not possible to tell
Q: Premise: "A man making cement risers."
Hypothesis: "A man making cement risers for a new apartment building."
Do we know that the hypothesis entailed by the premise?

R & A: You can't be surfing in the water and sitting on the beach simultaneously.
no
Q:
Can we conclude from "A guy with a red shirt is surfing ahead of the waves." that "A guy sitting on the beach watching the surf."?
Options:
- yes
- no
- it is not possible to tell