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: What happened was they knew his parents.
Example Output: 0

Example Input: Who did Plato listen to DP Demosthenes' oration about?
Example Output: 0

Example Input: Bill left when I believe the claim that the bomb had just exploded.
Example Output:
0