The Coupon<br>Ava wanted a new pair of jeans. She found a coupon for 25% off of her favorite store. She tried on lots of pairs. She found the perfect pair! They looked and felt great, so she bought them.
Ava desired lots of pairs of jeans.
The scenario uses the singular; "Ava wanted a new pair of jeans." This suggests a single pair, not multiple.
( z1 desire :ARG0 ( z2 person :name ( z3 name :op "Ava" ) ) :ARG1 ( z4 jeans :quant ( z5 pair :quant ( z6 lot ) ) ) )