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_name_89 ( writer VARCHAR, producer VARCHAR, director VARCHAR )

### Question ###
Who was the writer that the director was Alice Troughton and the producer was Phil Collinson?

### Accurate SQL ###

SELECT writer FROM table_name_89 WHERE producer = "phil collinson" AND director = "alice troughton"