Task: Question Answering
Input (English): passage: The fourth series of Line of Duty, consisting of six episodes, began broadcasting on 26 March 2017 on BBC One. The story follows DS Kate Fleming (Vicky McClure), DS Steve Arnott (Martin Compston) and Superintendent Ted Hastings (Adrian Dunbar) as they investigate the actions of DCI Roseanne Huntley (Thandie Newton). The supporting characters include FC Tim Ifield (Jason Watkins), DC Jodie Taylor (Claudia Jessie), and DS Sam Railston (Aiysha Hart). As with the previous two series, the storyline is linked thematically to that of series 1.
 question: is there a line of duty series 4?
Output (English): Yes