\section{Search-Engine Queries}

Plagiarism in the given suspicious documents should be found via  the
ChatNoir search engine~\cite{chatnoir}.
In order to achieve relevant results we need to construct appropriate queries,  which are then sequentially executed.% according to their priority.

We can divide constructed queries into three main groups according to  their origin:
 i) document keywords based, ii) intrinsic plagiarism based, and iii) headers based. 


