You will be given a sentence. Check whether the sentence is grammatically correct and is meaningful. If the sentence is grammatically correct, then answer with '1', otherwise answer with '0'.

Example Input: Mary believed his to have loved her.
Example Output: 0

Example Input: Every man who said he would buy some salmon did buy some salmon.
Example Output: 1

Example Input: Maxwell is more of a doctor than his son is.
Example Output:
1