Breakdown of En el momento en que la vi, supe que era ella.
ser
to be
ella
she / her (after a preposition)
en
in / on / by (means of transport) / about (after pensar)
ver
to see; to watch (TV, a film)
que
that (relative pronoun, conjunction)
saber
to know (facts, information)
la
it / her (f)
el momento
the moment
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