Complex sentence: In the Tenth Doctor episode "The Poison Sky", the Doctor mentions that he could use "the Brigadier"; he is then told that "Sir Alistair" is "stranded in Peru", indicating that the Brigadier has been knighted.
Split into simpler sentences: In the Tenth Doctor episode "The Poison Sky", the Doctor mentions that he could use "the Brigadier". He is then told that "Sir Alistair" is "stranded in Peru", indicating that the Brigadier has been knighted.