The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed.

2 answers

Read the sentence aloud. Where do you naturally pause? Two commas are needed in this sentence to represent those pauses and help comprehension.
http://grammar.ccc.commnet.edu/grammar/commas.htm

See #4.