¿Quiénes eran el chico y la chica que entraron en el restaurante? - Eran Brad y Pamela.Who were the boy and the girl who went into the restaurant? - They were Brad and Pamela.
Esos chicos se estaban metiendo con mi hijo. Le pregunté quiénes eran, pero no quiso contestarme.Those kids were bullying my son. I asked him who they were, but he refused to answer.
No sabíamos quiénes eran ni de qué barrio venían, pero estaba clarísimo que eran muy violentos y peligrosos.We didn't know who those people were or what area they were from, but it was plain to see they were very violent and dangerous.