CREATE TABLE table_8147 ("Year" FLOAT, "Tournament" TEXT, "Surface" TEXT, "Round" TEXT, "Winner" TEXT, "Score" TEXT, "Length" TEXT, "Ivanovic" FLOAT, "Jankovic" FLOAT)

What is the highest result for Jankovic at Indian Wells and round of SF?
SELECT MAX("Jankovic") FROM table_8147 WHERE "Round" = 'sf' AND "Tournament" = 'indian wells'
SELECT MAX("Jankovic") FROM "table_8147" WHERE "Round" = 'sf' AND "Tournament" = 'indian wells'