You will be given a definition of a task first, then some input of the task.
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.

a first language -lrb- also mother tongue , native language , arterial language , or l1 -rrb- is the language a human being learns from birth.
Output:
a first language is the language a human being learns from bitrh ; also termed as a mother tongue , native language , arterial language , or l1.