Detailed Instructions: Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.
Q: Sentence: 'Windows and Microsoft Excel are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries .', Argument/Subject 1: 'excel', Argument/Subject 2: 'microsoft corporation'
A:
be register trademark of