A question about Supplementary questions (Please Help me)

[Tin Sn]

Dear everyone,
 

I am applying to a PhD program in the Department of Electrical and Computer Engineering from a university in the United State.I am having a problem about the supplementary questions which will be used for helping graduate admission evaluating my applications.

First, it asked me to fill out the research publications.

Secondly, it asked my to fill out the name of the professors that I am interested in working with.

Finally,...the last section asked me whether there is additional information I wish to share with the school.

Well, I have no problem with the first two questions, but the last one is .... well what should I write.
Do you think that it is OK to left BLANK for this part? Or Do you think it is better to write something down. 

My first idea was to write about how my previous research had influenced my direction about future research and choosing professor.

However, it is true that my vision about my research and professor's research can be wrong.
I mean, in fact, I cannot predict what the professor is thinking and indeed, my idea cannot
be precise about the research of the professor.

My answer can be something cliche or not interesting or even showing my misconception, so ... what do you think.  

Thank you for taking time, and  your replies. 

Sn tina