Question: Who is the visitor team on Saturday, November 22 when Linköpings HC was the home team and there were more than 20 rounds?
SQL: SELECT "Visitor" FROM "2-18943645-4" WHERE "Home" = 'Linköpings HC' AND "Round" > 20.0 AND "Date" = 'Saturday, November 22';

Question: What is the lowest attendance on monday, november 10 when linköpings hc was the home team and there were more than 18 rounds?
SQL: SELECT MIN("Attendance") FROM "2-18943645-4" WHERE "Home" = 'linköpings hc' AND "Date" = 'monday, november 10' AND "Round" > 18.0;

Question: Who is the visitor at the AXA Sports Center in round 20?
SQL: SELECT "Visitor" FROM "2-18943645-4" WHERE "Venue" = 'AXA Sports Center' AND "Round" = 20.0;