Mercyful_fate The man, who happens to be married to the woman, is my friend. I get the impression that the man has been mentioned before this sentence and therefore the relative clause just gives additional information about him. Consequently, the commas are needed and that couldn't be used instead of who .
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Mercyful_fateThe man, who happens to be married to the woman, is my friend.I get the impression that the man has been mentioned before this sentence and therefore the relative clause just gives additional information about him. Consequently, the commas are needed and that couldn't be used instead of who.
Mercyful_fateThos