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: A group that wants lower immigration has forecast if Britain votes to remain in the EU, net migration will exceed 250,000 a year for at least 20 years.

EU referendum: Warning over net migration if UK votes to Remain