You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Police officers, armed with model MarkV-A1, were shot at the end of a protest against police killings of Alton Sterling in Baton Rouge, Louisiana, and Philando Castile in Falcon Heights, Minnesota, what was used to disable the shooter?" whose answer is C4.
Each document should contain about 30 words, and these documents should contain useful information.

Query: response to police shooter in Baton Rouge and Falcon Heights
Useful Output:

Doc 1: Police killed Alton Sterling and Philando Castile this week. The internet helps us document the horrors of racist policing and hold law
Doc 2: The July 17 fatal shootings of police officers in Baton Rouge literally hit home for Michael Combs, a University of Nebraska-Lincoln political science
Doc 3: Young people in Philadelphia are responding to the recent death of two black men by police officers just a day apart, one in Louisiana and
Doc 4: We are the Service Employees International Union (SEIU), a union of about 2 million diverse members in healthcare, the public sector and
Doc 5:  shootings in Baton Rouge, Louisiana and Falcon Heights, Minnesota; and the shooting of the 11 police officers at a protest in Dallas, Texas.