Sentence:  However , one must expect that vaporization and ejection of material by hypervelocity impacts would cause a deviation from a linear <WSD>relationship</WSD> . 
Meaning of the word marked with <WSD> tags:  a relation between people; (`relationship' is often used where `relation' would serve, as in `the relationship between inflation and unemployment', but the preferred usage of `relationship' is for human relations or states of relatedness)