Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: An email supplied by an ex-DUP adviser to the inquiry into NI's flawed green energy scheme appears to show someone in the party did not want cost controls introduced.

DUP 'cost controls' email revealed at green scheme inquiry