Do these mean the same?
Thaw participated in two of the cross-country Bendix trophy races , which were held in 1931 and instituted annually to promote and encourage the achievements of U.S. aviation .
Thaw participated in two of the cross-country - Bendix - trophy races , which were introduced in 1931 and held annually to promote the achievements of U.S. aviation .

OPTIONS:
[+] no;
[+] yes;
no