Read the following premise and answer if the hypothesis is true.
Former Prime Minister Rafik Hariri, also a prominent anti-Syria political figure, was killed in a suicide bombing in February last year, which led to rising anti-Syrian waves and the withdrawal of Syrian troops from Lebanon.
Hypothesis: The withdrawal of Syrian troops from Lebanon was planned by the assassin that killed the former Prime Minister. . Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say. The hypothesis makes an assumption about the motivations and actions of the assassin, which cannot be definitively proven or