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To run the script:

Requirements:
1) Java- language_tool_python library needs java fo installation
To install java on ubuntu:

First, update package repositories, then run following commands:
sudo apt install default-jdk
sudo apt update
sudo apt install default-jre

2) Install language_tool_python library be:
pip3 install language_tool_python

3) Install easygui (needed to open dialogue box to select file)

3) Run the script.