Some groups remain outside these broad groupings, such as faith groups or national parliamentarians. Electron withdrawing groups are assigned to similar groupings. They are divided into 17 distinct ethnolinguistic groupings, many of which are poorly documented. There are different archaeological interpretations of these groupings. Standardised Drug Groupings (SDGs) define groups of drugs. Attempts to represent the different groupings in maps have varied widely. They are divided into the Monogenea and Cestoda groupings. In practice, many of these groupings may overlap. Criminal gangs in Burnaby are composed of elements of most ethnic groupings within Vancouver. These portals are often based around a specific national or regional groupings of institutions. They believe each of these groupings are complementary opposites. He also states that prestige results in different status groupings. Draft order is determined by a weighted system that is divided into three groupings. Each of these groupings of multiracial populations has a particular history. Tom McCarthy divided such works into three specific groupings&colon; pornographic, political, and artistic.