text: For "Who" substitute "He" or "They" -- these are clearly\nused for the "subject" of the sentence or the clause, the \nperson "initiating" the action of the verb\nFor "Whom" substitute "him" or "them" - these are clearly\nthe "object" of the clause, commonly used with prepositions\nor "receiving" the action of the verb\n\nIf you substitute using he/they\nor him/them, does the sentence sound right?\nIf not try the other case.