Given the sentence "Bicyclists and pedicabs go by a large white modern building." is it true that "The riders are racing."?

it is not possible to tell
Explanation: Just because bicyclists and pedicabs pass a large white modern building doesn't mean they are racing..

Test for natural language inference.
Premise: "A bike mechanic explains the physics of a bike to a registered nurse."
Hypothesis: "The mechanic is explaining something."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

yes
Explanation: The mechanic is explaining something refers to the physics of a bike to a registered nurse..

Premise: "Four dogs happily running in snow."
Hypothesis: "Four dogs are jumping in the river."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no

no
Explanation: One cannot be jumping and running at the same time. Snow usually is on the ground and would not be in the river..

Can we conclude from "A group of smiling women." that "The group were all women."?
Options:
- yes
- no
- it is not possible to tell
it is not possible to tell
Explanation: A group can appear to be women but not actually be all women..