彼らは暖かく迎えられた。

they (usually male); them

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

warm; mild; genial

to go out to meet; to receive; to welcome; to greet; to salute; to hail; to reach; to approach; to enter (a phase, era, etc.); to accept (e.g. as a member of a group or family); to call for; to summon; to invite; to approach (a certain time, a point in one's life, etc.)