Meaning of "multisent" property unclear

[jvamvas]

What does the multisent property of a question mean exactly?

According to the paper, it has been verified that every question is multi-sentence, so shouldn't multisent always be true? In fact, the following question from the dev set clearly relies on multiple sentences, but is annotated as "multisent": false.

          {
            "question": "How many years after he entered the army did Cavour become prime minister?",
            "sentences_used": [0, 7],
            "multisent": false
          },

Context:
Cavour was a younger son of a noble Piedmontese family, and entered the army in 1826, serving in the engineers.
[...]
In 1850 he became minister of commerce; in 1852, prime minister. After that, his history is the history of Italy itself.

[TikaToka]

@jvamvas Hi I'm having a same question with you. Have you Cleared what the multisent is?

[jvamvas]

@TikaToka No, I have not.