Complex sentence: Then Nobita suggests that they should go back in time to live in a place with very few humans.The group agreed with him and thus, they return to the past Japan, which is 70000 years back from then.
Split into simpler sentences: Then Nobita suggests that they should go back in time to live in a place with very few humans. Thus, they return to the past Japan, which is 70000 years back from then.