I don't understand how to read the print out in the chat when using the /x command.

Example:
Candyman13 used 4 explosives: Large Rechargeable Battery: [wall (1) [1]], C4: [Floor (1) [2]], Thompson: [refinery_small_deployed (1) [1], foundation (1) [1]]

According to this it looks like a Large Rechargeable Battery was used to blow up a wall. What are the (1) and [1] supposed to respresent?