conjunct

yhteinen

sävelkulku- puhekieltä Either term of a conjunction
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puhekieltä An adjunct that supplements a sentence with information, not considered to be an essential part of the propositional content, that connects the sentence with previous parts of the discourse, as "therefore" in "It was raining. Therefore, we didn't go swimming."
conjoined

Set A is conjunct with set B.