Table: olympics_2008_men_400m
Columns: rank
lane
athlete
nationality
time
react

Question: How many total Time listings have a 0.209 React entry and a Rank that is greater than 7?
SQL: SELECT COUNT("time") FROM olympics_2008_men_400m WHERE "react" = 0.209 AND "rank" > 7

Question: How many total Rank listings have Liu Xiaosheng listed as the athlete with a react entry that is smaller than 0.245?
SQL: SELECT COUNT("rank") FROM olympics_2008_men_400m WHERE "athlete" = 'liu xiaosheng' AND "react" < 0.245

Question: What is the total average for Rank entries where the Lane listed is smaller than 4 and the Nationality listed is San Marino?
SQL: SELECT AVG("rank") FROM olympics_2008_men_400m WHERE "lane" < 4 AND "nationality" = 'san marino'

Question: What Lane has a 0.209 React entered with a Rank entry that is larger than 6?
SQL: SELECT "lane" FROM olympics_2008_men_400m WHERE "react" > 0.209 AND "rank" > 6