CREATE TABLE table_63784 ("Name" TEXT, "GP-GS" TEXT, "Gain" FLOAT, "Loss" FLOAT, "Long" FLOAT, "Avg/G" FLOAT)

What is the long figure when gain is less than 0?
SELECT AVG("Long") FROM table_63784 WHERE "Gain" < '0'
SELECT AVG("Long") FROM "table_63784" WHERE "Gain" < '0'