The scientists are anxious to avoid a repetition of the lunar rock fiasco 30 years ago, in which quarantine measures were breached.
(The scientists; are; anxious to avoid a repetition of the lunar rock fiasco 30 years ago) (The scientists; to avoid; a repetition of the lunar rock fiasco 30 years ago) (quarantine measures; were breached; L:the lunar rock fiasco 30 years ago)
The scientists The scientists quarantine measures
are to avoid were breached
anxious to avoid a repetition of the lunar rock fiasco 30 years ago
a repetition of the lunar rock fiasco 30 years ago
L:the lunar rock fiasco 30 years ago