아래 두 문장의 문장구조를 잘 모르겠습니다.
두 문장 모두 of which 가 사용되는데, of which가 포함된 문장의 주어와 동사가 파악이 안됩니다.
At the same time, machine tool and die makers who provided all the prcision parts and mechanical devices for the factory infrastructure flouriched as technology continued to improve, the offshoots of which reared a range of new and exiting careers, particularly of interest to the large groups of young men returning from millitary duty around this time.
The entire cultural landscape was altered to focus on driving and the needs of the automobile consumer, the impact of which has had majour reverberations on the economic survival of the country.
각 문장의 주어와 동사가 무엇인지,
of which가 어떻게 해석이 되는지 아시는 분의 설명 부탁드립니다.