CREATE TABLE table_59221 ("Physical property" CLOB, "Helium" CLOB, "Neon" CLOB, "Argon" CLOB, "Krypton" CLOB, "Xenon" CLOB)

which Helium has a Argon of 189.6?
SELECT "Helium" FROM table_59221 WHERE "Argon" = '−189.6'
SELECT "Helium" FROM "table_59221" WHERE "Argon" = '−189.6'