Detailed Instructions: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
Problem:this quantitative measure indicates how much of a particular drug or other substance -lrb- inhibitor -rrb- is needed to inhibit a given biological process -lrb- or component of a process , i.e. an enzyme , cell , cell receptor or microorganism -rrb- by half.
Solution:
this quantitative measure indicates how much of a drug or other substance is needed to inhibit a biological process by half.