Latex - # 的问题

Question

我遇到了这个错误的问题：

You can't use `macro parameter character #' in horizontal mode.

当我将下一个 bibtex 添加到我的参考书目后，这个错误突然出现在奇怪的地方。

错误出现在第 13 行，无论这一行是什么（我删除了当前行，但错误仍然存​​在。以下是部分代码：

\documentclass[12pt,openany,draft]{mgr_eng}
%---packages---
\usepackage{times}
\usepackage{draftwatermark}
\usepackage{cleveref}
\usepackage[english]{babel}

%---global definition---
\author{Marcin Kulisiewicz}
\title{Oznaczanie nastawienia słów z użyciem metod uczenia maszynowego}
\engtitle{Word's sentiment evaluation using machine learning methods}
\supervisor{prof. Aleksander Zgrzywa, D.Sc., Ph.D., Associate Professor, Department of Information Systems, Faculty of Computer Science and Management} 
\guardian{Tomasz Kajdanowicz, Ph.D., Department of Information Systems, Faculty of Computer Science and Management}
\field{Computer Science}
\specialisation{Information Systems}

及参考书目：

@inproceedings{Esuli2006sentiwordnet,
  added-at = {2009-01-29T21:09:18.000+0100},
  author = "Esuli, Andrea and Sebastiani, Fabrizio",
  biburl = {http://www.bibsonomy.org/bibtex/23e410e9b5d848e4e315b292253b6ed9d/hkorte},
  booktitle = {In Proceedings of the 5th Conference on Language Resources and Evaluation (LREC’06},
  interhash = {12da884807d2866aa148cde8b036d2c4},
  intrahash = {3e410e9b5d848e4e315b292253b6ed9d},
  keywords = {WordNet opinion_mining semantics},
  pages = {417--422},
  timestamp = {2009-01-29T21:09:18.000+0100},
  title = "SENTIWORDNET: A publicly available lexical resource for opinion mining",
  url = {SENTIWORDNET: A publicly available lexical resource for opinion mining},
  year = 2006
}

@inproceedings{pak2010twitter,
  added-at = {2013-10-24T16:04:56.000+0200},
  author = {Pak, Alexander and Paroubek, Patrick},
  biburl = {http://www.bibsonomy.org/bibtex/2b34319052fd2b3dae7647b5e87c64b21/folke},
  booktitle = {LREC},
  interhash = {ac930b0459a3c8a2fc2d74c52a475026},
  intrahash = {b34319052fd2b3dae7647b5e87c64b21},
  keywords = {NIP analysis mining opinion sentiment twitter},
  timestamp = {2013-10-24T16:04:56.000+0200},
  title = {Twitter as a Corpus for Sentiment Analysis and Opinion Mining.},
  url = {http://scholar.google.de/scholar.bib?=info:bSEeALDtz4oJ:scholar.google.com/&output=citation&hl=de&ct=citation&cd=1},
  year = 2010
}

@inproceedings{jurafsky2014slajdy,
  author = {Jurafsky D., Manning C.},
  booktitle = {Coursera.com},
  keywords = {sentiment analysis natural language processing opinion mining},
  title = {Sentiment Analysis, [w:] Natural Language Processing.},
  year = 2014
}

@article{Feldman13cacm,
  added-at = {2013-04-03T16:02:50.000+0200},
  author = {Feldman, Ronen},
  biburl = {http://www.bibsonomy.org/bibtex/2e60a4ce1b7f5d1ac7ed734664fcb5844/flint63},
  doi = {10.1145/2436256.2436274},
  file = {ACM Digital Library:2013/Feldman13cacm.pdf:PDF},
  groups = {public},
  interhash = {5d9d370ba329bf9a2723c31e3a322060},
  intrahash = {e60a4ce1b7f5d1ac7ed734664fcb5844},
  issn = {0001-0782},
  journal = {Communications of the ACM},
  keywords = {v1205 acm paper ai language processing information retrieval emotion analysis},
  month = {apr},
  number = 4,
  pages = {82-89},
  timestamp = {2013-04-03T16:02:50.000+0200},
  title = {Techniques and Applications for Sentiment Analysis},
  username = {flint63},
  volume = 56,
  year = 2013
}

有人有想法吗？