Table schema:
CREATE TABLE table_name_48 (gold INTEGER, silver VARCHAR, nation VARCHAR, bronze VARCHAR, total VARCHAR)

Question: What is the total Gold with a Bronze smaller than 7, a Total of 1, a Nation of cape verde, and a Silver smaller than 0?
SQL: SELECT SUM(gold) FROM table_name_48 WHERE bronze < 7 AND total = 1 AND nation = "cape verde" AND silver < 0