Complex sentence: The upper one-third is a gold field with a Native American Snyder variety arrow in back and white facets, surrounded by "1898", the year Tulsa was officially incorporated and elected its first mayor, Edward Calkins.
Split into simpler sentences: The upper one-third is a gold field with a Native American arrowhead of the Snyder variety in back and white facets. This is surrounded by "1898", the year Tulsa was officially incorporated and elected its first mayor, Edward Calkins.