10. A computer system comprising: at least one processor; and memory storing instructions that, when executed by the at least one processor, cause the system to: receive, from a mobile device, an image of a screen displayed on the mobile device, identify recognized items for the image by performing recognition on the image, repeat the receiving and identifying for a plurality of images, select a set of images from the plurality of images, the set representing a chronological window of time, each image in the set having a timestamp within the chronological window, and identify entities appearing in the recognized items for images in a first portion of the window using the recognized items for images in a remaining portion of the window as context to disambiguate ambiguous entity references.
10. A computer system comprising: at least one processor; and memory storing instructions that, when executed by the at least one processor, cause the system to: receive, from a mobile device, an image of a screen displayed on the mobile device, identify recognized items for the image by performing recognition on the image, repeat the receiving and identifying for a plurality of images, select a set of images from the plurality of images, the set representing a chronological window of time, each image in the set having a timestamp within the chronological window, and identify entities appearing in the recognized items for images in a first portion of the window using the recognized items for images in a remaining portion of the window as context to disambiguate ambiguous entity references. 14. The system of claim 10 , wherein the memory further stores instructions that, when executed by the at least one processor, causes the system to: determine that a next chronological image is associated with a first mobile application that differs from a second mobile application associated with a last image in the set; determine that the first mobile application launched the second mobile application; and include the next chronological image in the set.