What is the species with the common name 'mouse'?
CREATE TABLE table_21136 (
    "Species" text,
    "Species common name" text,
    "NCBI Accession Number (mRNA/Protein)" text,
    "Length (bp/aa)" text,
    "Protein Identity" text
)
SELECT COUNT("Species") FROM table_21136 WHERE "Species common name" = 'Mouse'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the species with the common name 'mouse'? ### Input: CREATE TABLE table_21136 (
    "Species" text,
    "Species common name" text,
    "NCBI Accession Number (mRNA/Protein)" text,
    "Length (bp/aa)" text,
    "Protein Identity" text
) ### Response: SELECT COUNT("Species") FROM table_21136 WHERE "Species common name" = 'Mouse'