Martin/General Dynamics RB-57F Canberra
The Martin/General Dynamics RB-57F Canberra is a specialized strategic reconnaissance aircraft developed in the 1960s for the United States Air Force by General Dynamics from the Martin B-57 Canberra tactical bomber , which itself was a license-built version of the English Electric Canberra . 
<triplet> Martin B-57 Canberra <subj> United States Air Force <obj> operator <subj> English Electric Canberra <obj> based on