Limitations：
1. The Comprehensiveness of movie data API
We cannot make sure that the movie data we get per month is all the movies showed at that month.
There might be some missing movie data that we cannot collect through our API
2. The inconsistency of the time range in input economic data
the stock price data begins from 1995
Some economic indexes begin in 1960
3. Monthly-based data causing not enough training data
