ner_tags: O O O O O B-Person I-Person B-Person I-Person B-Person I-Person B-Person I-Person B-Person I-Person O B-Person I-Person O O B-Person O B-Person O O O O O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O B-Location B-Organization O O O B-Grant B-Person O O O B-Organization O B-Grant O B-Software
tokens: We thank the referee and B. Czerny, C. Done, C. Knigge, J. Matthews, H. Netzer, and D. Starkey for discussions. P.H. and G.S. acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), funding reference number 2017-05983. K.H. acknowledges support from STFC grant ST/M001296/1. Software: MATLAB.