Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
wu:fa12d01BC0609427955SMN1    fa12d01    smn   
wu:fa12d01NM_1311917955SMN1    fa12d01    smn   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002