apertium-lex-tools software package provides Constraint-based lexical selection module, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apertium-lex-tools
apertium-lex-tools is installed in your system.
Make ensure the apertium-lex-tools package were installed using the commands given below,
$ sudo dpkg-query -l | grep apertium-lex-tools *
You will get with apertium-lex-tools package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Science |
| Package | apertium-lex-tools |
| Version | 0.1.1~r60994-1build1 |
| Description | Constraint-based lexical selection module |
| Sub Section | Science |