Update index.md

docs/index.md

@@ -11,7 +11,7 @@ However, this data often exists only in clinical text, and not in any structured
        
 ##  Features
 ### Pre-Annotations
-Sometimes concept mentions are simple and straightforward for algorithms to recognize. In these cases, we allow for <i>pre-annotations<i>; these pre-outline the suggested span of text and pre-label it. The user can then to choose to accept in just a single click, or modify or delete.
+Sometimes concept mentions are simple and straightforward for algorithms to recognize. In these cases, we allow for <i>pre-annotations</i>; these pre-outline the suggested span of text and pre-label it. The user can then to choose to accept in just a single click, or modify or delete.
 <figure>
        <img src="files/suggestion.png" width="500">
        <figcaption>In this image, there are 3 pre-annotations: on flagyl, BUN, and NGT.</figcaption>