esos eran

those were

→ ese
phrase Rare #38,386
those were Refers to a group of masculine or mixed-gender people or things in the past.
SP: Esos eran mis libros favoritos.
EN: Those were my favorite books.

Esos eran Abraham y Sara.

Those were Abraham and Sarah.

— Fresas salvajes (1957)

Sin duda alguna, esos eran recuerdos de mi vida pasada.

Without a doubt, those were memories from my past life.

Esos eran los cachorros.

Those were the puppies.

— La princesa Mononoke (1997)

Esos eran de apenas una novia.

Those were from just a girlfriend.

Esos eran otros tiempos, Sue.

Those were different times, Sue.

— Rang de Basanti (2006)

¡Y esos eran los mejores!

And those were the best ones!

— Andrei Rublev (1966)

Esos eran detalles que no tenían por qué saber el uno del otro.

Those were details they didn’t need to know about each other.

— Y tu mamá también (2001)

Esos eran los buenos tiempos.

Those were the good times.