-The most straightforward method is to use an online search engine in order to enrich
-document base with potential plagiarized documents and evaluate the amount of plagiarism by detailed document comparison.
-In this paper we introduce a method which has been used in PAN 2012 competition\footnote{\url{http://pan.webis.de/}}
-in plagiarism detection.
-In the first section we described our aproach to retrieve candidate documents for detailed document comparison from online sources.
+%The most straightforward method is to use an online search engine in order to enrich
+%document base with potential plagiarized documents and evaluate the amount of plagiarism by detailed document comparison.
+%In this paper we introduce a method which has been used in PAN 2012 competition\footnote{\url{http://pan.webis.de/}}
+%in plagiarism detection.
+In the first section we will introduce methods for candidate document retrieval from online sources, which took part in
+PAN 2012 competition\footnote{\url{http://pan.webis.de/}} in plagiarism detection.
+The task was to retrieve a set of candidate source documents that may had served as an original to plagiarize from.
+In the PAN 2012 candidate document retrieval test corpus, there were 32 text documents all contained at least one plagiarism case.
+The documents were approximately 30 KB of size, the smallest were 18 KB and the largest were 44 KB.
+
+In the second section we describe our approach of detailed document comparison.