Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_201_31 ( id number, "number" number, "author" text, "first line" text, "notes" text )

### Question ###
which author had a poem on this list with the first line as it fell upon day and also a poem that starts with if music and sweet poetry agree .

### Accurate SQL ###

SELECT "author" FROM table_201_31 WHERE "first line" = '"as it fell upon a day"'