user: Question: Matches of 15, and a Win % smaller than 20 had what highest lost?
Columns: ['Nationality', 'Matches', 'Drawn', 'Lost', 'Win %']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['England', 145.0, 37.0, 39.0, 47.6]
SQL:

assistant: SELECT MAX("Lost") FROM "Table" WHERE "Matches" = 15.0 AND "Win %" < 20.0;