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.

Example Input: System Reference: i am sorry. i did not find any expensive restaurants in outer richmond.
Original Reference: there are no restaurant -s in the outer richmond area in the expensive price range.
Example Output: 0

Example Input: System Reference: the inn on castro is located in the castro area.
Original Reference: the inn on castro is in the castro area.
Example Output: 0

Example Input: System Reference: what type of food would you like to eat?
Original Reference: what kind of food are you searching for?.
Example Output:
1