What's the animals name when the genus/species is rattus norvegicus? 
CREATE TABLE table_15417439_1 (common_name VARCHAR, genus_species VARCHAR)
SELECT common_name FROM table_15417439_1 WHERE genus_species = "Rattus norvegicus"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15417439_1 (common_name VARCHAR, genus_species VARCHAR) Question: What's the animals name when the genus/species is rattus norvegicus?  [/INST] SELECT common_name FROM table_15417439_1 WHERE genus_species = "Rattus norvegicus" </s>