Premise: "A welder welding something together."\nHypothesis: "A welder at work."\nDo we know that the hypothesis entailed by the premise?
Let’s work this out in a step by step way to be sure we have the right answer.
yes
A welder's job is to weld things together and the fact that the welder welding something implies the welder is at work.

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The final answer: yes