How to use "based" in a sentence

Sentences

His time was enormously valuable to the country; his work was sensitive and often-required urgent decisions based upon first-hand examination of information to be found only in distant places

I was to be an executive producer of the show and the writer of one of the first four teleplays, which would be based on my novel Darkfall

The first was my script based on Darkfall, which I had written in two weeks