ner_tags: O O O O O O O O O O O O O O O O O O O O O O O O B-Organization B-Telescope I-Telescope I-Telescope O O O B-Organization I-Organization I-Organization I-Organization O O O O B-Organization I-Organization O B-Organization O B-Grant O O O O O O O O B-Proposal O B-Proposal
tokens: The authors would like to thank the referee for thoughtful comments which improved the manuscript. This paper is based on observations taken with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS5-26555. These observations are associated with the program numbers 9490 and 11147.