/usr/share/EMBOSS/test/data/mw2.dat is in emboss-test 6.3.1-6ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6
13.0 41.0 67.0 415.0 846.0 781.0