user: Question: what is the wind speed when Brenda Morehead was in the United States?
Columns: ['Rank', 'Fastest time (s)', 'Wind (m/s)', 'Athlete', 'Nation', 'Date', 'Location']
Types: ['real', 'real', 'real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 10.88, 2.0, 'Marlies Göhr', 'East Germany', '1 July 1977', 'Dresden']
SQL:

assistant: SELECT "Wind (m/s)" FROM "Table" WHERE "Nation" = 'United States' AND "Athlete" = 'Brenda Morehead';