Which viewers have the language of troff (typesetter runoff) , groff (gnu runoff)?
{'header': ['Language', 'Creator', 'First public release date', 'Editor', 'Viewer'], 'page_title': '', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text'], 'id': '1-1574968-1', 'section_title': '', 'caption': '', 'rows': [['Computable Document Format', 'Wolfram Research', '2010', 'Mathematica', 'CDF Player'], ['Darwin Information Typing Architecture (DITA)', 'IBM, OASIS', '2005', 'Text / XML editor', 'Output to HTML , PDF , CHM , javadoc , others.'], ['DocBook', 'The Davenport Group, OASIS', '1992', 'XML editor', 'Output to HTML , PDF , CHM , javadoc , others.'], ['Encoded Archival Description (EAD)', 'Berkeley Project', '1998', 'Text editor', 'Web browser'], ['Extensible HyperText Markup Language (XHTML)', 'W3C', '2000 (January 26)', 'Text / XML editor , HTML editor', 'Web browser'], ['HyperText Markup Language (HTML)', 'Tim Berners-Lee', '1993', 'Text editor , HTML editor', 'Web browser'], ['LilyPond', 'Han-Wen Nienhuys , Jan Nieuwenhuizen', '1996', 'Text editor , Scorewriter', 'Output to DVI , PDF , PostScript , PNG , others.'], ['Maker Interchange Format (MIF)', 'Frame Technology acquired by Adobe Systems in 1995', '1986', 'Text editor , FrameMaker', 'FrameMaker'], ['Math Markup Language (MathML)', 'W3C', '1999 (July)', 'Text / XML editor , TeX converter', 'Web browser , Word processor'], ['Music Extensible Markup Language (MusicXML)', 'Recordare', '2002', 'Scorewriter', 'Scorewriter'], ['Office Open XML (OOXML)', 'Ecma International , ISO / IEC', '2006', 'Office suite', 'Office suite'], ['OpenDocument Format (ODF)', 'OASIS , ISO / IEC', '2005', 'Office suite', 'Office suite'], ['Open Mathematical Documents (OMDoc)', 'Michael Kohlhase', '2000', 'Text / XML editor', 'Output to XHTML + MathML , TeX , others.'], ['Rich Text Format (RTF)', 'Microsoft', '1987', 'Text editor , Word processor', 'Word processor'], ['Scalable Vector Graphics (SVG)', 'W3C', '2004', 'Vector graphics editor', 'Web browser , etc.'], ['Script', 'IBM', '1968', 'Text editor', 'GDDM, AFP viewer'], ['TeX', 'Donald Knuth', '1978', 'Text editor', 'DVI or Portable Document Format (PDF) converter'], ['troff (typesetter runoff) , groff (GNU runoff)', 'Joe Ossanna', '1973', 'Text editor', 'groffer, or output to PostScript'], ['Wireless Markup Language (WML)', 'WAP Forum', '1999', 'Text / XML editor', 'Microbrowser']], 'name': 'table_1574968_1'}