Complex sentence: On June 21, civil rights workers Michael Schwerner, Andrew Goodman, and James Chaney disappeared in Neshoba County, Mississippi where they were volunteering in the registration of African-American voters as part of the Mississippi Summer Project.
Split into simpler sentences: On June 21, civil rights workers Michael Schwerner, Andrew Goodman, and James Chaney disappeared in Neshoba County, Mississippi. The three were volunteers aiding in the registration of African-American voters as part of the Mississippi Summer Project.