Given the task definition and input, reply with output. 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: i regret that there are 0 restaurants in opera plaza that do not allow kids.
Original Reference: there are 0 restaurant -s where kid -s are allowed in the opera plaza area.
0