Put the following sentences in the correct and create an APA unstructured informative abstract.

The purpose of this study was to document the type of food marketing activities occurring in Canadian schools and examine differences by school characteristics. Overall, 84% of schools reported at least one type of food marketing and the median number of distinct types of marketing per school was 1 (range 06). Food marketing, Schools, Canada, Policy, Food environment, Obesity, Self-regulation, Children, Adolescents An online survey was sent to public primary and secondary schools from 27 school boards in Ontario, British Columbia, and Nova Scotia and was completed by 154 Principals in spring 2016. The presence of food marketing in most participating schools suggests that the current patchwork of policies that restrict food marketing in Canadian schools is inadequate. Unhealthy food marketing is considered a contributor to childhood obesity. In Canada, food marketing in schools is mostly self-regulated by industry though it is sometimes restricted through provincial school policies.