Let's break down the sentence: "The sound echoes back to the bats like a radar beam."
Nouns (N):
- sound (N)
- bats (N)
- beam (N)
Pronouns (pron):
- There are no pronouns in this sentence.
Adjectives (adj):
- The (adj - determiner)
- radar (adj - attributive adjective, describing beam)
So, presented with the required annotations, it looks like:
- The (adj) sound (N) echoes back to the (adj) bats (N) like a (adj) radar (adj) beam (N).
No pronouns were present.