The following question consists of an incomplete sentence or a sentence split into four parts. All four parts are jumbled up and are named P, Q, R, and S. These four parts are not given in their proper order. Arrange the jumbled parts of the sentence and find out which of the four combinations from the given options will correctly complete the sentence.

At least seven _________________island of Ischia.

P: people have died in an enormous landslide

Q: that struck the densely 

R: populated port city of Casamicciola 

S: on the southern Italian