この歌はかれらに愛されている。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

song; classical Japanese poetry (esp. tanka); modern poetry

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

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

to love