#NEXUS 
[Data set from Carlson, 1999.
  The name of the file is G591 Vertebrates.nex
    Type this in using the format shown.] 
BEGIN DATA; DIMENSIONS  NTAX=10 NCHAR=14; FORMAT MISSING=? GAP=- ;
 MATRIX 
   shark           10000000000000 
   tuna            11000000000000 
   frog            11100000000000 
   Dimetrodon      1111001??00000 
   human           11110011101000 
   whale           11110011100000 
   crocodile       11111110000000 
   Saurischian     1111111??11110 
   bird            11111110111111 
   Ornithiscian    1111111??11001
    ; 
   END;