or
Correct the one word that is spelled incorrectly.
i
X
When
i
X
they
i
X
found
i
X
high
i
X
levels
i
X
of
iridium
i
X
at
i
X
a
i
X
site
i
X
in
Italy,
i
X
geologists
Walter

i
X
and
Luis Alvarez
i
X
realized
i
X
that
i
X
an
i
X
asteroid
i
X
might
i
X
have
i
X
struck
i
X
Earth
i
X
at
i
X
that

i
X
location
i
X
This
i
X
impact
i
X
provided
i
X
a
i
X
possible
i
X
explaination
i
X
for
i
X
why
i
X
the
i
X
dinosaurs

i
X
went
i
X
extinct
ref_doc_title.

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