['alcove', 'seal', 'EmptyParameter', 'field', 'by']
["Synset('enclosure.n.01')", 'berry-13.7', 'EmptyParameter', "Synset('natural_phenomenon.n.01')", 'by']
As a safety measure, the bed's alcove is sealed by a force field.
as a Synset('device.n.01') measure, the bed's Synset('enclosure.n.01') is sealed by a Synset('out.n.01') Synset('natural_phenomenon.n.01').