Added some information to the proto file

site/docs/relations/logical_relations.md

@@ -51,7 +51,7 @@ a read operation across several nodes.  The slicing parameters are specified as
 into the file.
 
 Many file formats consist of indivisible "chunks" of data (e.g. parquet row groups).  If this
-happens the producer can determine which slice a particular chunk belongs to.  For example, one
+happens the consumer can determine which slice a particular chunk belongs to.  For example, one
 possible approach is that a chunk should only be read if the midpoint of the chunk (dividing by
 2 and rounding down) is contained within the asked-for byte range.