キャッチされない構文エラー 予期しないトークン U JSON 質問する

Chromeでページを実行すると、「キャッチされない構文エラー 予期しないトークンU」というエラーが表示されます。Firefoxでは、「JSON.parse: 予期しない文字」が表示されます。PHPファイルからJSONデータを返していますが、返されるJSON文字列は有効です。出典: http://www.jsonlint.com/。

返されたJSON文字列は次のとおりです。

[
    ["1","Pan Africa Market","\"1521 1st Ave, Seattle, WA\"","47.608941","-122.340145","restaurant"],
    ["2","The Melting Pot","14 Mercer St, Seattle, WA","47.624562","-122.356442","restaurant"],
    ["3","Ipanema Grill","1225 1st Ave, Seattle, WA","47.606366","-122.337656","restaurant"],
    ["4","Sake House","230 1st Ave, Seattle, WA","47.612825","-122.34567","bar"],
    ["5","Crab Pot","1301 Alaskan Way, Seattle, WA","47.605961","-122.34036","restaurant"],
    ["6","Mexican Kitchen","2234 2nd Ave, Seattle,WA","47.613975","-122.345467","bar"],
    ["7","Wingdome","1416 E Olive Way, Seattle, WA","47.617215","-122.326584","bar"],
    ["8","Piroshky Piroshky","1908 Pike pl, Seattle, WA","47.610127","-122.342838","restaurant"]
]