Reference for Bava Batra 111:2

ואמר רבה והוא שיש חיוב חטאת ביניהם אבל כרמלית לא אביי אמר אפילו כרמלית אבל פיסלא לא רבא אמר אפילו פיסלא

This too, said Rabbah, is only the case if there is between the two public places a place the carrying into which [from either of them would] render him liable to a sin offering,<span class="x" onmousemove="('comment',' I.e., a private place, this being regarded as an effective division. ');">²</span>

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