For many years Arsenal's away colours were white shirts and either black or white shorts. In the 1969–70 season, Arsenal introduced an away kit of yellow shirts with blue shorts. This kit was worn in the 1971 FA Cup Final as Arsenal beat Liverpool to secure the double for the first time in their history. Arsenal reached the FA Cup final again the following year wearing the red and white home strip and were beaten by Leeds United. Arsenal then competed in three consecutive FA Cup finals between 1978 and 1980 wearing their "lucky" yellow and blue strip, which remained the club's away strip until the release of a green and navy away kit in 1982–83. The following season, Arsenal returned to the yellow and blue scheme, albeit with a darker shade of blue than before.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What color shirts were worn by Liverpool players in 1971?
unanswerable