user: Question: How many total Rank listings have liu xiaosheng listed as the athlete with a react entry that is smaller than 0.245?
Columns: ['Rank', 'Lane', 'Athlete', 'Nationality', 'Time', 'React']
Types: ['real', 'real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 6.0, 'Chris Brown', 'Bahamas', 44.79, 0.205]
SQL:

assistant: SELECT COUNT("Rank") FROM "Table" WHERE "Athlete" = 'liu xiaosheng' AND "React" < 0.245;