Table: riga_marathon_results
Columns: country
total
marathon_men_s
marathon_women_s
half_marathon_men_s
half_marathon_women_s

Question: When the total winners was smaller than 2 and 2 woman won, what's the average of the men's half marathon winners?
SQL: SELECT AVG("half_marathon_men_s") FROM riga_marathon_results WHERE "marathon_women_s" = 2 AND "total" < 2