The 2017 EFL League Two play-off Final was a football match that was contested between Blackpool and Exeter City. The match was played at Wembley Stadium on 28 May 2017. Blackpool won the game 2-1 and were promoted to League One for the 2017-18 season.
The promotion lasted a year
The promotion lasted for the 2017-18 year which is one year making my statement correct. I am guessing the model got confused by the way I phrased the dates
( z1 last :ARG1 ( z2 promote ) :ARG2 ( z3 temporal-quantity :quant 1 :unit ( z4 year ) ) )