Is this grammatically correct? What does it mean? Any possible rephrasing? Somebody should find me those roommates that taught him this

Yes, the sentence is grammatically correct. It means that the speaker desires someone to locate or identify the roommates who taught "him" (presumably a male individual mentioned earlier) something specific. The speaker insists that those roommates need to be found because they imparted knowledge or skills to the person in question. Here are a few possible rephrasings of the sentence: 1. "Someone should track down the roommates who taught him this." 2. "Somebody should locate those roommates who taught him this." 3. "I need someone to find the roommates that taught him this." 4. "It would be good if someone could find those roommates who taught him this." Each version maintains the original meaning while slightly varying the structure.