An user Galician
says…

Crese
  que
Subordinating conjunction
  faleceu
Verb
  a
Determiner
  causa
Noun
  da
 peste.

The cause of the plague is believed to have died.
Words and sentences
New
crese

first/third-person singular imperfect subjunctive of crer

New
que

New
faleceu

third-person singular preterite indicative of falecer

New
a

New
causa

New
da

of the; from the

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