A worker specified as being in construction is ordinarily involved in 'building stuff'; one who 'works on a structure' is even more likely to be 'building stuff'; 'a construction worker' establishes that there is a construction worker.
The question and answer are below.
Premise: "A construction worker works on a metal structure."
Hypothesis: "There is a construction worker building stuff."
Do we know that the hypothesis entailed by the premise?
yes

They cannot be catching a ball if they are handling a stapler.
The question and answer are below.
Can we conclude from "Sitting guy handling a stapler while another guy looks on." that "A guy sitting is catching a ball from another guy."?
Options:
- yes
- no
- it is not possible to tell
no

If something is made of metal it is not made of jello.
The question and answer are below.
Given the sentence "A man is touching a large metal structure." can we conclude that "A man is resting on a jello statue."?
Options:
- yes
- it is not possible to tell
- no
no