A flat fluorescent lamp includes a first substrate, a second substrate, an external electrode, and a radiating member. A polybenzoxazole resin and a resin film having excellent heat resistance and a small permittivity and a semiconductor device using the resin film can be obtained from the benzoxazole resin precursor. A fixing device is usable to fix the first cylinder in a desired position relative to the second cylinder. A bottom side of the top cover protrudes downward to form a fixing pillar of which a lower part defines a second fixing structure. Then the priority determination section determines priority for sending image data obtained by cameras installed in the disaster area on the basis of the extracted setting information.