Read the text and determine if the sentence is true:

Things Happen at Night is a 1947 British supernatural ghost comedy film directed by Francis Searle and starring Gordon Harker, Alfred Drayton, Robertson Hare and Gwynneth Vaughan. The film is based upon a stage play, "The Poltergeist", by Frank Harvey Jnr.

Sentence: The Poltergeist was written by Frank Harvey Junior.
Yes