Alpha and beta separation

Sch book 3, LOS 23 t, Pg 153, 3 para

It says ’ an advantage of alpha beta approach is that the investor can gain access to equity styles and asset classes outside of systematic risk class’

Can anyone please provide an example for ‘outside of systematic risk class’ and as to how the strategy works.

Many thanks for your time.

Hi anyone can please share their interpretation/assumption on the above.

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