Complex sentence: It should be noted that, as the 40-bit string from this example was (obviously) not randomly chosen, the above is in fact "not" a validly generated ULA routing prefix according to the standard.
Split into simpler sentences: It should be noted that the 40-bit string from this example was (obviously) not randomly generated. The prefix above is therefore in fact "not" a validly generated ULA routing prefix according to the standard.