What is the NCBI Accession Number (mRNA/Protein) for the mus musculus Species?
CREATE TABLE table_7847 (
    "Species" text,
    "Species common name" text,
    "NCBI Accession Number (mRNA/Protein)" text,
    "Length (bp/aa)" text,
    "Protein Identity" text
)
SELECT "NCBI Accession Number (mRNA/Protein)" FROM table_7847 WHERE "Species" = 'mus musculus'
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 NCBI Accession Number (mRNA/Protein) for the mus musculus Species? ### Input: CREATE TABLE table_7847 (
    "Species" text,
    "Species common name" text,
    "NCBI Accession Number (mRNA/Protein)" text,
    "Length (bp/aa)" text,
    "Protein Identity" text
) ### Response: SELECT "NCBI Accession Number (mRNA/Protein)" FROM table_7847 WHERE "Species" = 'mus musculus'