{ "items" : [
    { "id" : "http://dbpedia.org/resource/Mainstream_Top_40"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The Mainstream Top 40 (referred to as Pop Songs on billboard.com) is a weekly airplay chart from Billboard magazine.There are 40 positions on the chart, and it is solely based on radio airplay. The chart ranks the week's hottest pop songs, ranked by mainstream top 40 radio airplay detections as measured by Nielsen BDS Nielsen Broadcast Data Systems. Arbitron sometimes refers to the format as contemporary hit radio."] } } }
