Read the text and determine if the sentence is true:

Rona Munro (born 7 September 1959) is a Scottish writer. She has written plays for theatre, radio, and television. Her film work includes Ken Loach's "Ladybird, Ladybird" (1994), "Oranges and Sunshine" (2010) for Jim Loach and "Aimee & Jaguar" (1999), co-authored by German director Max Farberbock.

Sentence: Rona Munro is mostly known for her movies.
It's impossible to say