How to use unique() in a cell array

I have a cell array that I need to find the individual names that come up

a =

  91×1 cell array

    {[roof-dent              ]}
    {2×1 categorical          }
    {[Sidemirror-Damage      ]}
    {[RunningBoard-Dent      ]}
    {3×1 categorical          }
    {[rear-bumper-dent       ]}
    {[rear-bumper-dent       ]}
    {2×1 categorical          }
    {[roof-dent              ]}
    {[Rear-windscreen-Damage ]}
    {[RunningBoard-Dent      ]}
    {[Rear-windscreen-Damage ]}
    {[Front-Windscreen-Damage]}
    {[doorouter-dent         ]}
    {[rear-bumper-dent       ]}
    {[fender-dent            ]}
    {2×1 categorical          }
    {2×1 categorical          }
    {[bonnet-dent            ]}
    {[rear-bumper-dent       ]}
    {2×1 categorical          }

The 2x1 and 3x1 also have the same data in them, just a possable other name. Is there a way to expand it, or use cellfun to use something like unique(a) on it?

I want an output like this

    output = {'roof-dent','Sidemirror-Damage','RunningBoard-Dent'......}

basically what unique(a) would do, but its not working for this example.

attached is the data

[the cyclist]

Can you upload the actual data (or maybe just a smaller sample that could serve as an example), and also be specific about what output you expect?

[Conner Carriere]

Uploaded and updated!

Answer 1

[the cyclist]

I'm not certain, but I believe what you want is

unique(vertcat(b{:}))

[Conner Carriere]

Correct, thank you!