Question: What was the 89th completed Football League season and the 1987–88 Port Vale F.C. season? 
Sentence (from "1987–88 Port Vale F.C. season"): Vale's league form also improved, as they finished in eleventh place, helped by midfielders Ray Walker and Robbie Earle, defenders Phil Sproson and Bob Hazell, and goalkeeper Mark Grew.
Relevant evidence: No