Claim: Season three of Game of Thrones is based on a poem.
Evidence: The season is based roughly on the first half of A Storm of Swords -LRB- the third of the A Song of Ice and Fire novels by George R. R. Martin , of which the series is an adaptation -RRB-.
A Song of Ice and Fire is a series of epic fantasy novels by the American novelist and screenwriter George R. R. Martin.