fix typo

Author: kirschbombe

source/presentation/4.0/index.md

@@ -349,7 +349,7 @@ Navigational resources provide structure for IIIF resources that allow viewing c
 
 ### Collection
 
-IIIF Collections are an ordered lists of Manifests, Collections, and/or Specific Resources. Collections allow these resources to be grouped in a hierarchical structure for navigation and other purposes.
+IIIF Collections are ordered lists of Manifests, Collections, and/or Specific Resources. Collections allow these resources to be grouped in a hierarchical structure for navigation and other purposes.
 
 Collections may include both other Collections and Manifests, forming a tree-structured hierarchy that expresses relationships among IIIF resources. This organization can represent archival or curatorial structures, logical groupings such as volumes or series, or dynamically generated sets of related items. As such, they enable clients to load predefined sets of resources at initialization, render dynamically generated sets such as search results, visualize lists or hierarchies of related content, and facilitate navigation through structured aggregations of Manifests and Collections.
 
@@ -428,7 +428,7 @@ Ranges may include Containers, parts of Containers via Specific Resources or fra
 
 This example is a Manifest with one Canvas, representing an artwork. The content resource, a JPEG image of the artwork, is associated with the Canvas via a Painting Annotation.
 
-The unit integer coordinates of the Canvas (12000 x 9000) are not the same as the pixel dimensions of the JPEG image (4000 x 3000), but they are proportional - the Canvas has a 4:3 landscape aspect ratio, and so does the JPEG image.The `target` property of the Annotation is the Canvas `id`, unqualified by any particular region; this is taken to mean the content (the image) should fill the Canvas completely. As the Canvas and the image are the same aspect ratio, no distortion will occur. This approach allows the current image to be replaced by a higher resolution image in future, on the same Canvas. The Canvas dimensions establish a coordinate system for _painting annotations_ and other kinds of annotation that link content with the Canvas; they are not pixels of images.
+The unit integer coordinates of the Canvas (12000 x 9000) are not the same as the pixel dimensions of the JPEG image (4000 x 3000), but they are proportional---the Canvas has a 4:3 landscape aspect ratio, and so does the JPEG image.The `target` property of the Annotation is the Canvas `id`, unqualified by any particular region; this is taken to mean the content (the image) should fill the Canvas completely. As the Canvas and the image are the same aspect ratio, no distortion will occur. This approach allows the current image to be replaced by a higher resolution image in future, on the same Canvas. The Canvas dimensions establish a coordinate system for _painting annotations_ and other kinds of annotation that link content with the Canvas; they are not pixels of images.
 
 The example demonstrates the use of the common descriptive properties `label` for the title of the artwork, `metadata` for additional information to display to the user, `summary` for a brief description of the artwork, `rights` to assert a rights statement or license from a controlled vocabulary, `homepage` to link to the artwork's specific web page, `thumbnail` to provide a small image to stand for the Manifest, `provider` to give information about the publisher of the Manifest, and finally, `service` to specify a IIIF Image API service that provides features such as deep zooming, derivative generation, image fragment referencing, rotation, and more.