TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: The Vatican Apostolic Library , more commonly known as the Vatican Library or informally as the Vat , is the library of the Holy See , located in Vatican City .

SOLUTION: The Vatican Library is the library of the Holy See .

PROBLEM: In positive psychology , social scientists study what might contribute to living a good life , or what would lead to people having increased positive mood and overall satisfaction with their life .

SOLUTION: In positive psychology , researchers are studying what gives a person satisfaction in life .

PROBLEM: During the Islamic State of Iraq and the Levant 's occupation of Mosul , she posted comments on her Facebook account critical of ISIS ' destruction of religious shrines there .

SOLUTION:
She posted criticism of ISIL 's destruction of religious places in Mosul .