The topics ranged from love and sex to history and time, but it was all poetry in motion Sunday at the Arts Bank in Center City. Sonia Sánchez, poet laureate of Philadelphia and professor emeritus at Temple, headlined the event, which featured more than 100 poets. "I cannot waltz my tongue. Under a soprano sky, a woman sings, lovely as chandeliers," said Sanchez in reading her poem, "Under a Soprano Sky.”