Claim: Macbeth is a film adaptation of a Shakespearean comedy.
Evidence: Macbeth -LRB- or The Tragedy of Macbeth -RRB- is a 1971 British-American historical drama film directed by Roman Polanski and co-written by Polanski and Kenneth Tynan.
Macbeth -LRB- -LSB- məkˈbɛθ -RSB- full title The Tragedy of Macbeth -RRB- is a tragedy by William Shakespeare ; it is thought to have been first performed in 1606.