Responsa על חולין 95:7

I also asked [in my dream] regarding the lung of an animal which is found to be stuck to the ribs by the sectioning of the lobes¹See Chullin 48a:7, which is kosher, but only when the lung is attached to the flesh [of the ribs] and not to the bones²See Rashi on Chullin 48a:8 and Rif Chullin 12a:2. Is it however enough that it is attached to one of them, the flesh or the bones, to be considered kosher?³This is the opinion of Rabbeinu Gershom, cited in Tosafot on Chullin 48a:8