Question:  Albert Lee Ueltschi, was once personal pilot to which American?
Sentence (from "Juan Trippe"): He was instrumental in numerous revolutionary advances in airline history, including the development and production of the Boeing 314 Clipper, which opened trans-Pacific airline travel, the Boeing Stratocruiser which helped to pioneer cabin pressurization, the Boeing 707 which launched the Jet Age, and the Boeing 747 which introduced the era of jumbo jets (evolved from Air Force bombers, tanker and transport design, respectively).
Relevant evidence: No