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'.
One example: Our friends won't buy this analysis, let alone the next one we propose.
Solution is here: 1
Explanation: Since all the entities are in thier correct positions the statement is grammatically correct.Hence, the output is 1.

Now, solve this: A wonderful opportunity presented itself yesterday.
Solution:
1