user: Question: What is the lowest react of the athlete from the united states who has a lane less than 4?
Columns: ['Rank', 'Lane', 'Athlete', 'Country', 'Time', 'React']
Types: ['real', 'real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 5.0, 'Veronica Campbell-Brown', 'Jamaica', 22.19, 0.187]
SQL:

assistant: SELECT MIN("React") FROM "Table" WHERE "Country" = 'united states' AND "Lane" < 4.0;