Complex sentence: In 1918 she moved to Petrograd, adopted Irina Odoevtseva as a pen name, joined the Second Guild of Poets, was tutored by Nikolai Gumilyov and become his favourite student.
Split into simpler sentences: In 1918 she moved to Petrograd and adopted Irina Odoevtseva as a pen name. She joined the Second Guild of Poets, was tutored by Nikolai Gumilyov and become his favourite student.