An essential relative clause provides necessary, defining information about the noun. On the other hand, non‐ essential relative clauses provide additional, non‐necessary information about the noun.

Here, “Jan always feels left out” is the main clause and “the second of three children” is the nonessential phrase. We can move nonessential elements to different parts of a sentence, which can make ...

In a Thursday letter acting GSA administrator Stephen Ehikian said the GSA “has taken the first steps in a Government-wide initiative to eliminate non-essential consulting contracts,” which the letter ...