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: The US pharmaceutical giant Pfizer has confirmed that it will buy a US cancer drug firm, Medivation, for about $14bn (£10.7bn).

Pfizer to buy cancer drug firm Medivation for $14bn