CREATE TABLE table_16083989_1 (species VARCHAR2, voges_proskauer VARCHAR2, indole VARCHAR2)

Which species show a negative result with both voges-proskauer and indole?
SELECT species FROM table_16083989_1 WHERE voges_proskauer = "Negative" AND indole = "Negative"
SELECT "species" FROM "table_16083989_1" WHERE "Negative" = "indole" AND "Negative" = "voges_proskauer"