requirement-n; 3 Senses

Sense Number 1: a duty or obligation

Commentary: REQUIREMENT[+activity][+social][+duty]
NOTE: {requirement PREP NP/COMP} requirement is an attribute of the NP/COMP

Examples:
The requirements of the job include three graveyard shifts a week.
The only requirement they placed on their daughter was to be home by midnight.
The requirements of overseeing the emergency room put a lot of stress on Bob.
FEMA's requirement of

Mappings:
PropBank: requirement.01
WordNet 2.0 Sense Numbers: 1

Sense Number 2: a need or essential

Commentary: REQUIREMENT[+condition][+need][+primary]
NOTE: (requirement PREP NP) implies that (requirement EQUAL NP) Also: requirement BE NP (again, equality)

Examples:
No one could satisfy Sally's constant requirement for attention.
The artist's only requirements were a pen and a piece of paper.
China's requirements for more energy may have contributed to higher oil prices.

Mappings:
PropBank: requirement.01
WordNet 2.0 Sense Numbers: 2

Sense Number 3: a prerequisite for achieving a goal

Commentary: REQUIREMENT[+condition][+need][+subordinate][+previous]
NOTE: (requirement PREP NP/COMP) implies (requirement NOT EQUAL NP/COMP)
NOTE: requirement is a separate precursor to the NP in the COMP

Examples:
He couldn't pass the physical requirements for becoming a Marine.
There is no essay requirement for that college.
Countries must first meet certain economic requirements before joining the EU.

Mappings:
PropBank: requirement.01
WordNet 2.0 Sense Numbers: 3