Detailed Instructions: Given a text, write a compressed version of it in a single sentence.
Q: In a countermove, Airbus today announced plans to build the A318, a 107-seat passenger jet that will pose a challenge to Boeing's 737, a still-popular commuter plane derived from 1960's technology.
A:
Airbus today announced plans to build the A318, a 107-seat passenger jet that will pose a challenge to Boeing's 737.