CREATE TABLE table_name_75 (year NUMBER, venue VARCHAR2, event VARCHAR2)

Which Year has a Venue of bydgoszcz, poland, and an Event of junior team?
SELECT AVG(year) FROM table_name_75 WHERE venue = "bydgoszcz, poland" AND event = "junior team"
SELECT AVG("year") FROM "table_name_75" WHERE "bydgoszcz, poland" = "venue" AND "event" = "junior team"