What is the relationship between Emergency and nine in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.
Text: A BNSF hazardous materials team arrived at the scene at about 3:30 a.m. Friday, more than nine hours after the derailment, according to the Montana Department of Emergency Services.
user
original_broadcaster
assistant