I want to know the answer to the following question:
Who wrote the movie Stella in 1955?
All the background I'm provided with is that "Notable films were Η κάλπικη λίρα (1955 directed by Giorgos Tzavellas), Πικρό Ψωμί (1951, directed by Grigoris Grigoriou), O Drakos (1956 directed by Nikos Koundouros), Stella (1955 directed by Cacoyannis and written by Kampanellis).". Is that enough to answer the question?