1972–73 Ekstraklasa
{'<entity_0>': 'association football', '<entity_1>': '1971–72 Ekstraklasa', '<entity_2>': '1972–73 Ekstraklasa', '<entity_3>': 'Ekstraklasa', '<entity_4>': '14'}
[['1972–73 Ekstraklasa', 'sport', 'association football'], ['1972–73 Ekstraklasa', 'number of participants', '14'], ['1972–73 Ekstraklasa', 'sports season of league or competition', 'Ekstraklasa'], ['1972–73 Ekstraklasa', 'follows', '1971–72 Ekstraklasa']]
The <entity_2> was the 47th season of the Polish Football Championship and the 39th season of the <entity_3>, the top Polish professional league for <entity_0> clubs, since its establishment in 1927. A total of <entity_4> teams participated, 12 of which competed in the league during the <entity_1>, while the remaining two were promoted from the 1971–72 II liga.
['sports season']