In the same scene, Emilia finds Desdemona's handkerchief, but, Iago enters, snatches it from her and forbids her from mentioning its whereabouts.
Emilia finds Desdemona's handkerchief. This is in the same scene. Iago enters. Iago snatches it from her. Iago forbids her from. Iago is mentioning its whereabouts.