cameras with a 1:1 ratio and weighing less than 560.0 use which compression format?
(AND digicams.camera_compressed_format (JOIN (R digicams.digital_camera.compressed_formats) (AND (le digicams.digital_camera.weight 560.0^^http://www.w3.org/2001/XMLSchema#float) (JOIN (R digicams.camera_image_ratio.cameras) m.04p7ch2))))