The category "<nlb_careful>" can be expressed as follows:

<nlb_careful>

<nlb-9>

<nlb_prefix-1> <nlb-1>

<nlb_prefix-2> <nlb-2>

<nlb_prefix-3> <nlb-3>

<nlb_prefix-4> <nlb-4>

<nlb_prefix-5> <nlb-5>

<nlb_prefix-6> <nlb-6>

<nlb_prefix-7> <nlb-7>

<nlb_prefix-8> <nlb-8>