CREATE TABLE table_13699 ("Year" FLOAT, "Labour" FLOAT, "Lib Dem" FLOAT, "Green" FLOAT, "IWCA" FLOAT, "Independent" FLOAT, "Conservative" FLOAT)

Name the the average Lib Dem with Conservative smaller than 0?
SELECT AVG("Lib Dem") FROM table_13699 WHERE "Conservative" < '0'
SELECT AVG("Lib Dem") FROM "table_13699" WHERE "Conservative" < '0'