Entered "Import Sentence Diagrams" into the Command field. This command appeared in the drop down list. However, hitting Enter did not appear to do anything. While searching to see if this was on KS4J's parity list, Logos Quit unexpectedly. 
2642.LogosLogs Jack Caviness 20120708-070035.gz
Tried this again. Rather than an Unexpected Quit received a frozen application with core 3 activity @ 100% for an extended period of time. Attempted Cmd-Q. The window closed, but L4 Mac refused to turn loose. Finally forced quit from Activity Monitor.
6661.LogosLogs Jack Caviness 20120708-072405.gz
Recommend that Logos either fix this feature or disable the command.