Roleset lengthen.01 Verbnet Class: 1 "make longer":

Roles:

Arg0:cause, agent


Arg1:thing getting longer


Arg2:EXT


Arg3:start point


Arg4:end point

Examples:

person: ns tense: past aspect: ns voice: active form: full


ergative, with EXT and end point (-)
Average maturity of the funds' investments lengthened by a day to 41 days, the longest since early August, according to Donoghue's.
Arg1:	Average maturity of the funds' investments
REL:	lengthened
Arg2-by:	a day
Arg4-to:	41 days, the longest since early August,

person: ns tense: present aspect: perfect voice: active form: participle


agentive (-)
Mr. Ireland said current demand for used aircraft is strong, partly because surging orders for new aircraft have lengthened waiting lists.
Arg0:	surging orders for new aircraft
REL:	lengthened
Arg1:	waiting lists

Look at other examples of the class for additional examples of usage.