[NTG-context] Centering lines of poetry.

Here is a deceptively simple requirement: An author writes poetry where lines are ended by a carriage retrun and stanzas are ended by a blank line. Problem: How to enclose those lines somehow so that all lines are centered yet font changes are allowed. Of course \centerline{} works but this requires tagging each line. Any thoughts, anyone? -- John Culleton Able Typesetters and Indexers http://wexfordpress.com