At least one implementation described herein relates to evaluating queries structured according to a first format against one or more objects structured according to a second, different format without serializing the object. The laser printer does a continuous double-side printing for a preceding paper and a following paper. The plurality of holes can be arranged in sets to allow mounting of the tool in various orientations and configurations to provide differing edge orientations for different landscaping tasks, and to allow a single tool to be used with a variety of different bucket attachments. The substrate is disposed between the cover plates, and combined with the cover plates to form a first passageway and a second passageway. The emitter is disposed on both the intrinsic base and the extrinsic base, and has a band gap energy greater than that of the base.