Roleset disturb.01 Verbnet Class: 1 "bother":

Roles:

Arg0:disturber


Arg1:disturbed


Arg2:instrument, if separate from arg0

Examples:

person: third tense: present aspect: ns voice: active form: full


active (-)
But the administration's handling of the fetal-tissue transplant issue disturbs many scientists.
ArgM-DIS:	But
Arg0:	the administration's handling of the fetal-tissue transplant issue
REL:	disturbs
Arg1:	many scientists

person: ns tense: past aspect: ns voice: passive form: participle


normal passive (-)
Some analysts also were disturbed *trace* by a pickup in the growth of business inventories.
ArgM-DIS:	also
REL:	disturbed
Arg1:	*trace* -> Some analysts
Arg0-by:	a pickup in the growth of business inventories

person: ns tense: present aspect: ns voice: passive form: participle


passivized subject introduced by weird preposition (-)
They were disturbed *trace* at what they regarded as Dr. Baltimore's confrontational attitude toward the Dingell committee, which held hearings on a dispute over the lab notebooks of a researcher who had co-authored a scientific paper with Dr. Baltimore.
REL:	disturbed
Arg1:	*trace* -> They
Arg0-at:	what they regarded as Dr. Baltimore's confrontational attitude toward the Dingell committee, which held hearings on a dispute over the lab notebooks of a researcher who had co-authored a scientific paper with Dr. Baltimore

I don't read this at-phrase the same as I do the at-phrases for 'frustrate'; this seems equivalent to a by-phrase, whereas for 'frustrate' the two are not interchangeable.