Datastructure:

(:library (
	(:ghost ()) (
	(:house (
		(:teapot (
			(:moth ()) 
			()))
		()))
	()))
)

(:Vessel ())

## Default

(:library ((:ghost ()) ((:house ((:teapot ((:moth ()) ())) ())) ())))

## Create a NewVessel

(:library ((:NewVessel ()) ((:ghost ()) ((:house ((:teapot ((:moth ()) ())) ())) ()))))

## Take the NewVessel