1. Our eldest son, Mark, and I were shingling a roof.

2. (Article in which a vector space model was presented) David Dubin (2004), The Most Influential Paper Gerard Salton Never Wrote (Explains the history of the Vector Space Model and the non-existence of a frequently cited publication) Description of the vector space model Description of the classic vector space model by Dr E. Garcia Relationship of vector space search to the "k-Nearest Neighbor" search Bag-of-words model Compound term processing Conceptual space Eigenvalues and eigenvectors Inverted index Nearest neighbor search Sparse distributed memory w-shingling G. Salton , A. Wong , C. S. Yang, A vector space model for automatic indexing, Communications of the ACM, v.18 n.11, pp. 613-620, Nov. 1975