/usr/share/qt3/doc/html/graph.g1n is in qt3-doc 3:3.3.8-b-8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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num label 10 A 24 B 12 C 7 D 34 E 15 F 19 G