Answer:
No, the Knights of the Round Table were not real, they are fictional characters that belong to the legendary stories belonging to the Matter of Britain: the collection of Medieval Literature associated with Britain, and Briton legendary kings and Knights.
As for where they lived, according the stories, just like King Arthur, they lived in Britain (modern-day England), probably on the western side of the country.
They both shared a vision of an "agrarian" American utopia, that is, relating to farms and farming. They believed their perfect land lies in the fields and with the workers and farmers.
If we say simple predicate, this only refers to the main verb that is used in the sentence. So based on the given sentence above, the simple predicate is the word "arrived" and this is the main verb which describes the subject which is "nurse". Hope this answers your question.
The instructor really knows the subject.
The sentence is referring to a instructor so it should be the instructor not that instructor. It shouldn't be written as reallyknows it should be really knows. There is no need to capitalise the first alphabet of subject as it is simply a common noun.
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