The rules that use the vocabulary item "are" are:

<confirmation_relation-pl>

are

<controller_flight_advisory>

where are you

you are <controller_flight_advisory-not_recursive-adj>

<controller_flight_advisory-proceed_as_briefed>

you are <controller_flight_advisory-not_recursive-adj-proceed_as_briefed>

<cop-pl>

are

<contact_rel>

are

are at