You will be given a definition of a task first, then some input of the task.
You are given an original reference as well as a system generated reference. Your task is to judge the naturaleness of the system generated reference. If the utterance could have been produced by a native speaker output 1, else output 0.

System Reference: the phone number for source is 4158649000.
Original Reference: source 's phone number is 4158649000.
Output:
1