есть люди, которым

there are people who

→ быть
phrase Rare #45,122
there are people who Introduces people who are affected by or involved in what follows; которым means “to whom” or “for whom” and is used with the dative case.
RU: Есть люди, которым нравится работать ночью.
EN: There are people who like working at night.

Хотя есть люди, которым ничто не поможет.

Although there are people who nothing can help.

— Эксперимент (2001)

Есть люди, которым я не нравлюсь.

There are people who don't like me.