CREATE TABLE table_203_300 (id DECIMAL, "year" DECIMAL, "tournament" TEXT, "venue" TEXT, "result" TEXT, "extra" TEXT)

how many summer olympics has yelena slesarenko participated in ?
SELECT COUNT(*) FROM table_203_300 WHERE "tournament" = 'summer olympics'
SELECT COUNT(*) FROM "table_203_300" WHERE "tournament" = 'summer olympics'