Grading Survey Questions

Hello, 

I am a fairly new articulate 360 user. I am currently working on transitioning assessments and quizzes to eQuizzes. This worked great for the multiple choice assessments, however, one assessment we are hoping to transition is a free response type of assessment. The assessment asks behavioral based questions to evaluate soft-skills and personality traits of participants. We use this assessment as one component in deciding to promote production workers into training roles on the floor. 

We are really hoping to find a way to create the assessment through Storyline and have the answers auto-graded for us (even if there is a third party program that can do this and interact with our LMS to provide the results digitally). Currently, these assessments are hand-graded and the process is inefficient. We basically skim the answer provided by the participant and look for key words or key values. Is there a program out there that can do this?? Any insight on how to go about creating this type of assessment and having it auto-graded would be really helpful!