After correcting the answer, the sentence reads,
In contrast to trapeze artists, who fumbled their routine, the circus clowns kept the audience entertained for hours with their antics.
How are we sure that "their" does not refer to audience but to clowns.
While it is common knowledge that the antics belong to clowns, what is the grammatical rule to understand what "their" refers to.
Imagine you don't know what antics is.
Please provide link/s if this is already answered somewhere.
Thanks