e/Doctor Who and the Daleks in the Seven Keys to Doomsday

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has gloss	eng: Doctor Who and the Daleks in the Seven Keys to Doomsday was a stage play based on the long-running British science fiction television series Doctor Who. The play ran at the Adelphi Theatre in London, England for four weeks, beginning on 16 December 1974. Originally, the part of the Doctor was going to be played by Jon Pertwee, but the role went to character actor Trevor Martin instead. Martin had previously appeared in Doctor Who as a Time Lord in the 1969 serial, The War Games. In the play, it is stated that Martins version of the Doctor is regenerated from Pertwees; this makes him an alternate version of the Fourth Doctor (the play premiered about two weeks before Tom Baker began his television tenure as the Fourth Doctor).
lexicalization	eng: Doctor who and the daleks in the seven keys to doomsday
instance of	(noun) (in games or plays or other performances) the time during which play proceeds; "rain stopped play in the 4th inning" period of play, playing period, play