Remove consecutive duplicate words from a file using awk or sed

Question

My input file looks like below:

“true true, rohith Rohith;
cold burn, and fact and fact good good?”

Output shoud look like:

Answer 1

This is not exactly what you have shown in output but is close using gnu-awk:

awk -v RS='[^-_[:alnum:]]+' '$1 == p{printf "%s", RT; next} {p=$1; ORS=RT} 1' file

“true , rohith Rohith;
cold burn, and fact and fact good ?”