Displaying field in title

Steve <[email protected]> Thu, 29 Mar 2018 08:22:42 -0700
Newsgroups gmane.comp.web.interchange.users
Message-ID <[email protected]>
Looking for help on displaying field in <title> tag in header.
 
The field is in cat and field name is title_head_format
 
How would I display contents of this field in my <title> tag?
 
Steve Bronson 

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