Prepare align by adding `label` to table and crawl entities based on `ontology class`.

I added labels in order to align graphs easier.
`tvtropes` uses name as plain text in English, so I decided to use English label.

In addition, I started to crawl entities which are belong to `ontology class`, such as `Artist`, `Film` ... and so on.
Not now, I want to initialize several properties with its ontology name. 

In this case, I just use the ontology entities when I make SPARQL query. 
So, the SPARQL response has property `notableWork`.