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: Russian diplomats are being expelled by more than two dozen countries, following allegations - which it denies - that it poisoned a spy in the UK. How much difference will that make to Russia's extensive international presence?

Russian spy: How big is the Kremlin's diplomatic network?