User Result Fields & URL – array in result

Hi, I’m displaying custom entries on the results page when searching for users. Only issue is that if the result has more than one entry (for example a set of skills: CSS, PHP, JAVA etc) the result only returns the word ‘array’. How would I get this to show the full list of results?

Here is the code I am using, it’s the core_skills that returns an array
<p>{first_name} {last_name}</p>
<p>Salary {expected_salary} {currency}</p>
<p>Core skills {core_skills}</p>
<p>Job type {job_type}</p>