Who is the Third Captain?

Team: 
Lighting Bolts
Topic: Logic
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It is not an easy task to figure out who'd be the captain of the third team in an XFlag game.
However Lightning Bolts presents the solution to this challenging logic problem!!
Enjoy the solution and the video!!

Common Core Standards: SMP
Problem #: 
167 (2013-2014)
Problem Difficulty Level: 5 [?]