The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

P. In Tokyo, they built an expressway linking the international airport in Haneda to the centre and widened some of the city's major arteries.

Q. These infrastructure improvements helped to bring about the Japanese economic miracle over the next couple of decades.

R. Tokyo 2020 was supposed to be a great economic stimulus, replicating the achievements of Tokyo 1964.

S. It was thanks to hosting the Olympics that Japan invested in infrastructure such as the famous Shinkansen bullet train.