7. A computer program product, comprising: a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code configured to perform an operation for generating annotations for web content rendered by a web browser, the operation comprising: receiving, via a plug-in executing in the web browser, input specifying a first annotator of an Unstructured Information Management Architecture (UIMA) that provides a plurality of processing stages, wherein the first annotator is of a plurality of annotators, wherein each annotator is associated with a respective distinct content domain and is configured to, in one of the processing stages, generate annotations associated with the associated distinct content domain for text passages, receiving web content to render by the web browser, wherein the web content includes unstructured text, evaluating by the first annotator, the unstructured text in one or more of the plurality of processing stages to identify one or more passages in the unstructured text determined to have a predicted meaning within the distinct content domain associated with the first annotator, generating, in one or more of the processing stages by the first annotator, annotations for the identified one or more passages within the distinct content domain associated with the first annotator, generating visual indicators for the annotations for the identified one or more passages within the distinct content domain associated with the first annotator, and modifying the received web content to include the received web content, wherein the visual indicators are displayed when the browser renders the received web content.
9. The computer program product of claim 7 , wherein the operation further comprises, rendering the content and the annotations in the web browser.