Ameliorate the Triangle ShirtWaist Factory

Directions: students should correct the error filled sentences below, in red. There are three missing commas and a punctuation error.

The Triangle Factory fire which happened on March 25 1911 was one of the deadliest industrial disaster's in the history of new york city.

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Suggested Answer: 
The Triangle Factory fire, which happened on March 25, 1911, was one of the deadliest industrial disasters in the history of New York City.