Definition: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
Input: Question: A simple question that has sparked some debate, and I couldn't find a concrete answer anywhere. There seems to be two camps: The word plethora indicates plural, so therefore it should be "There are a plethora"; and the other camp says that there is only one plethora (which contains multiple), so it should be "There is a plethora". I've seen many examples of both. Is there a consensus, or is it just one of those things that can go either way? 
Answer: A plethora is singular, so one must say "there is a plethora of..." just as one would say "there is a bunch..." If you are dealing in several plethoras, you could use the plural: "there are plethoras of..." but this feels very contrived and artificial.

yes