reprezentantami

In a sentence

• Reprezentantami naszej drużyny są najlepsi młodzi sportowcy.

  The representatives of our team are the best young athletes.

  In this sentence, 'reprezentantami' is in instrumental plural form used to describe what entity is fulfilling the role of the 'reprezentant', hence specifying members fulfilling a representative role in a sports context.

• W trakcie konferencji rozmawialiśmy z reprezentantami różnych organizacji.

  During the conference, we talked with the representatives of various organizations.

  Here, 'reprezentantami' is in instrumental plural form, indicating the entities with whom the discussions were held, specifically pointing out their role as representatives of given organizations.

• Artyści stali się reprezentantami współczesnych trendów w sztuce.

  Artists have become representatives of contemporary trends in art.

  In this sentence, 'reprezentantami' follows the verb 'stali się', indicating the state or role taken by the subjects, namely artists, in representing specific artistic trends.