(I) Since the 1990s, computers have become steadily
faster and have provided access to increasing quantities
of on-line linguistics data. (II) Computational linguistics
seeks to develop the computational machinery needed
for an agent to exhibit various forms of linguistic
behaviour. (III) Methods based on statistical analyses of
such data have dramatically improved the accuracy with
which systems carry out tasks like understanding the
syntactic structure of a sentence. (IV) The success of
such methods has raised questions about how language
is represented and processed by the human mind, and
particularly about the role of statistics in language
understanding. (V) Further, it suggests that humans
might learn from experience by means of induction
using statistical regularities.

Which of the sentences in the given paragraph is
irrelevant, violating its unity and coherence?