Anchor: To help you identify these sources, you can use a variety of databases and other research tools, which include the Congressional Research Service Public Policy Literature Abstracts and organizations' Web sites.
Entailed: There are a variety of research tools that can be used to aid you in identifying these sources.
Contradiction: Databases will be of no help to you in finding and identifying sources.
Contradiction: Storm troopers surround students.
Contradiction: A child is in a swimming pool.
Contradiction: Selecting a target audience does not benefit advertisers 
Contradiction: A woman is carrying a large pot over her head