What is referred to by 'after nevada'?

What is associated with: after nbc canceled this sam waterston series in 1993 pbs produced a movie to wrap up its loose… What is associated with: after nearly 10 years of continuous occupation by astronauts it was de orbited in 2001? What is associated with: after nearly 100 years this company cut its oldsmobile brand from its line in 2004? What is associated with: after nearly 200 years of russian soviet rule this country regained its independence in 1991? What is associated with: after nuclear mutation giant ants terrorize los angeles in this 1954 classic? What is associated with: after numerous defeats in the civil war charles was beheaded in 1649 at the palace called this… What is associated with: after observing a comet in 1682 he proved it was the same one seen in 1607 1531 1456? What is associated with: after oct 19 1745 he would make no more modest proposals?