PLANES INTERSECTING? respond quick

G

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I don't understand this problem.

Planes A and B intersect in line s. Plane C intersects A and B, but does not contain s.

I am supposed to draw and label it, but I dont understand how to.
 
Make a triangle with two pieces of paper held out in front of you. You can see that these intersect in the line if you imagine that each piece of paper is infinitely wide (and long). These are the two planes A and B. Now you can imagine another piece of paper (plane C) cutting both these planes above or below this intersection so that they don't all intersect each other at the same point but C cuts through both nonetheless.
 
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