Complex sentence: Russell Herder is a national advertising, marketing, and public relations agency based in Minneapolis, Minnesota (with an additional office in Brainerd, Minnesota) that specializes in healthcare, building materials, and social issues.
Split into simpler sentences: Russell Herder is a national advertising, marketing, and public relations agency based in Minneapolis, Minnesota (with an additional office in Brainerd, Minnesota). The company specializes in healthcare, building materials, and social issues.