Tiny fix in example of Readme.md

[ferjorosa]

Hi, a very small thing, but when running the example presented in the Readme.md, in the "Interpreter Module" section, the argument "--output" is not currently supported. Here is the fixed line of code.

Current: python nspm/interpreter.py --input data/art_30 --output data/art_30 --query "yuncken freeman has architected in how many cities?"

New: python nspm/interpreter.py --input data/art_30 --query "yuncken freeman has architected in how many cities?"

[devmessias]

Hi @ferjorosa How are you running this project? I'm got the following error with both commands

terminated by signal SIGILL (Illegal instruction)