document, the term @strong{entity} indicates all of header fields and
body.@refill
-The definition of RFC 2045 indicates that a MIME message is a tree. An
-message is a tree, each node is an entity, like following figure.
-Namely MIME extends message to tree structure.@refill
+The definition of RFC 2045 indicates that a MIME message is a tree, and
+each node of the tree is an entity. Namely MIME extends message to tree
+structure.@refill
FLIM uses @strong{mime-entity} structure to represent
information of entity. In this document, it is called simply