In this survey, we review different text mining techniques to discover various textual patterns from the social networking sites. Social network applications create opportunities to establish interaction among people leading to mutual learning and sharing of valuable knowledge, such as chat, comments, and discussion boards. Data in social networking websites is inherently unstructured and fuzzy in nature. In everyday life conversations, people do not care about the spellings and accurate grammatical construction of a sentence that may lead to different types of ambiguities, such as lexical, syntactic, and semantic. Therefore, analyzing and extracting information patterns from such data sets are more complex. Several surveys have been conducted to analyze different methods for the information extraction. Most of the surveys emphasized on the application of different text mining techniques for unstructured data sets reside in the form of text documents, but do not specifically target the data sets in social networking website. This survey attempts to provide a thorough understanding of different text mining techniques as well as the application of these techniques in the social networking websites. This survey investigates the recent advancement in the field of text analysis and covers two basic approaches of text mining, such as classification and clustering that are widely used for the exploration of the unstructured text available on the Web.

Excavations conducted since Chomko's initial discovery in 1974 of Cucurbita pepo seeds have clarified their stratigraphic and radiometric context as well as delineated an earlier archaeological unit, the Squash and Gourd Zone, where a second cucurbit, Lagenaria siceraria, was found. The two units are Late Archaic with dates (weighted averages of radiocarbon assays) of 4257 ± 39 and 3928 ± 41 radiocarbon years B.P., respectively, and are beneath stratigraphically superior Late Archaic and Woodland units also containing cucurbits. A comparison of the early Cucurbita pepo with others from later contexts demonstrates an increasing size with time and morphology similar between the early seeds and the historic cultivar "Mandan." Nutritional value of the cucurbits, both cultigens, may have been comparable to that of other wild plant foods consumed. In any event, the cucurbits are artifacts of regional exchange mechanisms operating some 4000 years ago; the most plausible mechanism being down-the-line exchange.