Table schema:
CREATE TABLE table_name_30 (attendance INTEGER, round VARCHAR, home VARCHAR, date VARCHAR)

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 table_name_30 WHERE home = "linköpings hc" AND date = "monday, november 10" AND round > 18