7.5 avoid long and dif fi cult-to-read sentences involving which 1. In long sentences, replace the which clause by beginning anew sentence. Don’t worry about repeating the same keyword twice. 2. Consider changing the order of the information to make it easier for the reader to understand. YES NOT RECOMMENDED 1 The CNR is the Italian National Research Council and has many institutes where innovative research is carried out. These institutes are located in various parts of Italy such as Pisa, Turin and Rome. The CNR is the Italian National Research Council and has many institutes where innovative research is carried out and which are located in various parts of Italy such as Pisa, Turin and Rome. 2 The ethyl acetate phase was dried under a gentle stream of nitrogen, and was then redissolved with 50 mL of the eluent B. The ethyl acetate phase, which had been dried under a gentle stream of nitrogen, was redissolved with 50 mL of the eluent B. 7.6 avoid ambiguity with which 1. Which generally refers to the noun that it follows. So, in cases of possible ambiguity, avoid using which . Instead, split the sentence and repeat the subject. In the No example below, the position of which initially seems to refer to Table 2 . But in fact it refers to set of common rules . 2. When the which clause could refer to several but not all elements, remove which and repeat the specific elements. In the second No example below, which could refer to A and BB and Cor even AB and Cb YES NO 1 Each language is characterized by a set of common rules, as reported in Table 2. This set highlights the structure of that particular language. Each language is characterized by a set of common rules as reported in Table 2 which highlights the structure of that particular language. 2 Examples include AB and Cb Ab band B are normally established once a month. Examples include AB and Cb whichb are normally established once a month.