In 2011, screenwriter Noxon told Collider.com that plans for an imminent sequel were shelved due to the disappointing performance of the first installment at the box office.
will there be a sequel to the movie i am number four?
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Answer: no

An admirer of everything Dutch, Peter the Great originally named the city, Sankt-Peterburg (Russian: -; note that the Russian name lacks the letter s between Peter and burg). On 1 September 1914, after the outbreak of World War I, the Imperial government renamed the city Petrograd (Russian: , IPA: (pjtrgrat)), meaning ''Peter's city'', in order to expunge the German-sounding words Sankt and Burg. On 26 January 1924 it was renamed to Leningrad (Russian: , IPA: (ljnjngrat)), meaning ''Lenin's City''. On 6 September 1991, the original name, Sankt-Peterburg, was returned. Today, in English the city is known as ''Saint Petersburg''. Local residents often refer to the city by its shortened nickname, Piter (Russian: , IPA: (pjitjr)).
is leningrad and st petersburg the same place?
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Answer: yes

The storyline was softly rebooted with a main narrative led by an adult Henry Mills, set several years after last season's events. In February 2018, it was announced the seventh season would serve as the final season of the series; the season and series concluded on May 18, 2018.
is season 7 the last season for once upon a time?
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Answer:
yes