SELECT cover photo using LiQL

How can I SELECT the cover photo using LiQL?

SELECT * FROM images WHERE messages.id = '740'

Gives me the two images for this post; one is in the body, the other is the cover but there's no apparent distinction between them. How can I know which is which?

Result:

{
  "status" : "success",
  "message" : "",
  "http_code" : 200,
  "data" : {
    "type" : "images",
    "list_item_type" : "image",
    "size" : 2,
    "items" : [ {
      "type" : "image",
      "id" : "140iB4FAF2B355B5AD53",
      "href" : "/images/140",
      "view_href" : "/t5/media/gallerypage/image-id/140iB4FAF2B355B5AD53",
      "title" : "798.jpg",
      "description" : "tanks alot",
      "tiny_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/tiny?v=1.0&px=100",
      "thumb_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/thumb?v=1.0&px=150",
      "small_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/small?v=1.0&px=200",
      "medium_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/medium?v=1.0&px=400",
      "large_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/large?v=1.0&px=999",
      "original_href" : "/t5/image/serverpage/image-id/140iB4FAF2B355B5AD53/image-size/original?v=1.0&px=-1",
      "width" : 735,
      "height" : 551,
      "owner" : {
        "type" : "user",
        "id" : "38",
        "href" : "/users/38",
        "view_href" : "/t5/user/viewprofilepage/user-id/38",
        "login" : "IanAtJMP"
      },
      "upload_time" : "2018-01-04T09:00:06.950-08:00",
      "upload_time_friendly" : "3m ago",
      "album" : {
        "type" : "album",
        "id" : "36",
        "href" : "/albums/36",
        "view_href" : "/t5/media/gallerypage/album-id/36",
        "title" : "Hidden (IanAtJMP)"
      },
      "messages" : {
        "query" : "SELECT * FROM messages WHERE images.id = '140iB4FAF2B355B5AD53'"
      },
      "comments" : {
        "query" : "SELECT * FROM messages WHERE images.id = '140iB4FAF2B355B5AD53' AND is_image_comment = true"
      },
      "kudos" : {
        "query" : "SELECT * FROM kudos WHERE image.id = '140iB4FAF2B355B5AD53'"
      },
      "visibility" : "public"
    }, {
      "type" : "image",
      "id" : "141iD8A4CDD9B9529974",
      "href" : "/images/141",
      "view_href" : "/t5/media/gallerypage/image-id/141iD8A4CDD9B9529974",
      "title" : "cthulhu.jpg",
      "description" : "",
      "tiny_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/tiny?v=1.0&px=100",
      "thumb_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/thumb?v=1.0&px=150",
      "small_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/small?v=1.0&px=200",
      "medium_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/medium?v=1.0&px=400",
      "large_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/large?v=1.0&px=999",
      "original_href" : "/t5/image/serverpage/image-id/141iD8A4CDD9B9529974/image-size/original?v=1.0&px=-1",
      "width" : 1280,
      "height" : 720,
      "owner" : {
        "type" : "user",
        "id" : "38",
        "href" : "/users/38",
        "view_href" : "/t5/user/viewprofilepage/user-id/38",
        "login" : "IanAtJMP"
      },
      "upload_time" : "2018-01-04T09:00:27.151-08:00",
      "upload_time_friendly" : "3m ago",
      "album" : {
        "type" : "album",
        "id" : "36",
        "href" : "/albums/36",
        "view_href" : "/t5/media/gallerypage/album-id/36",
        "title" : "Hidden (IanAtJMP)"
      },
      "messages" : {
        "query" : "SELECT * FROM messages WHERE images.id = '141iD8A4CDD9B9529974'"
      },
      "comments" : {
        "query" : "SELECT * FROM messages WHERE images.id = '141iD8A4CDD9B9529974' AND is_image_comment = true"
      },
      "kudos" : {
        "query" : "SELECT * FROM kudos WHERE image.id = '141iD8A4CDD9B9529974'"
      },
      "visibility" : "public"
    } ]
  },
  "metadata" : { }
}