Definition: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Input: Context: The human NEDD4 gene is located on chromosome 15q21.3, and consists of 30 exons that transcribe five protein variants of NEDD4, all of which vary in the C2 domain but share 100% identity from the first WW domain through to the end of the protein.
Question: What species is NEDD4 specific to?
Output:
human