According to a ' radical orphanage ' approach, non-restrictive relative clauses are not part of the syntactic representation of the sentence that contains them. It is an appealing view, and seems to capture some important properties of non-restrictive relative clauses. Focusing mainly on empirical shortcomings, this paper aims to show that the appeal of such approaches is illusory. It also outlines an empirically superior ' syntactically integrated ' account.

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This paper introduces the topic of evaluation of natural language processing systems, and discusses the role of test suites in the linguistic evaluation of a system. The work on test suites that is being carried out within the framework of the TSNLP project is described in detail and the relevance of the project to the evaluation of machine translation systems considered.

Flavonoid aglycone variation within Helianthus annuus, a species widely distributed throughout North America, was analyzed. Flavonoid aglycones of H. annuus consist of two types, flavones and chalcones. The flavone aglycones are sequestered in glandular trichomes that occur on both leaf surfaces, whereas the chalcone aglycones appear to be incorporated in the waxy leaf cuticle. Considerable variation in flavonoid profile was observed with some plants exhibiting as few as one, and others as many as seven of the eight aglycones detected. No definable phytogeographic patterns were observed for this flavonoid variation. Flavonoid aglycone variation also did not differentiate the infraspecific taxa within H. annuus.