occur-v; 4 Senses

Sense Number 1: happen or take place

Commentary: Syntax Includes: NP1 OCCUR ADVP NP1 OCCUR (PP[temporal]) NP OCCUR (PP[locative])
NOTE: implies specific temporal events--the event has a beginning and an end. ('occur' in this sense can often be replaced with 'happen' but not with 'be')

Examples:
She was in the shower while the theft was occurring.
The girl wished something exciting would occur in her life.
Did anything interesting occur at the meeting?
An explosion occurred when he flipped the switch.

Mappings:
VerbNet: occurrence-48.3.1
FrameNet: Event
PropBank: occur.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: come to mind

Commentary: Syntax Is: NP1[topic[abstract]] OCCUR to NP2[experiencer]

Examples:
A strange thought has just occurred to me.
It never occurs to John to thank his staff for their hard work.
No solution to the problem is occurring to the students.

Mappings:
VerbNet: NM
FrameNet: NM
PropBank: occur.01
WordNet 3.0 Sense Numbers: 2

Sense Number 3: exist, be present

Commentary: Syntax Includes: NP1 OCCUR ADVP NP1 OCCUR PP[locative] implies a state, rather than temporally specific events. ('occur' in this sense can often be replaced with 'be' but not with 'happen')

Examples:
Hard coal usually occurs in long seams within rock beds.
Hydrogen can occur in several states.
High crime rates occur where there is poverty and homelessness.

Mappings:
VerbNet: NM
FrameNet: NM
PropBank: occur.01
WordNet 3.0 Sense Numbers: 3

Sense Number 4: happen or go together

Commentary: Includes: CO-OCCUR WITH

Examples:
Insominia and other sleep disorders often co-occur with anxiety and panic attacks.

Mappings:
VerbNet: NM
FrameNet: NM
PropBank: NM
WordNet Verb Particle Constructions, Multiword Expressions:
co-occur_with 1