The document provides definitions and examples of concession clauses, conjunctions, and prepositions that are used to indicate a concession or contrast within a sentence. It defines a concession clause as offering a partial contrast that doesn't invalidate the main clause. It lists the conjunctions "although", "though", and "even though" as having similar meanings to introduce a concession, with "even though" adding the most emphasis. It also discusses the prepositions "in spite of the fact that" and "despite the fact that" functioning as conjunctions when followed by "the fact that". The document concludes with examples of sentences using concession conjunctions and prepositions.