What is an excavator?
An excavator is a heavy equipment machine that is used for moving large amount of earth at one time.  They have a boom and a huge bucket attached to them and are essentially a huge shovel used to prepare the ground for huge construction projects.  John Deere is one company that produces excavators.
<START_INST>What is an excavator?<END_INST><START_CTX><END_CTX><START_A>An excavator is a heavy equipment machine that is used for moving large amount of earth at one time.  They have a boom and a huge bucket attached to them and are essentially a huge shovel used to prepare the ground for huge construction projects.  John Deere is one company that produces excavators.<END_A>