Definition: In this task you will be given a passage and a yes/no question based on the passage. You should answer the question using the information from the passage.
Input: passage: Though not all of its rules represent law, the Highway Code states ``Only flash your headlights to let other road users know that you are there. Do not flash your headlights in an attempt to intimidate other road users''. Drivers warning others about speed traps have been fined in the past for ``misuse of headlights''.
 question: is it illegal to flash your headlights to warn of police uk?
Output:
No