| rank website | 0.56 |
| become more sophisticat… | 0.52 |
| get smarter | 0.51 |
| take into account users… | 0.40 |
| take a number of factors | 0.38 |
| change the types of res… | 0.38 |
| display search results | 0.36 |
| rely on weighting | 0.36 |
| track pagerank calculat… | 0.35 |
| track popularity | 0.35 |
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| kept secret | 0.71 |
| complex | 0.63 |
| more complex | 0.45 |
| sophisticated | 0.39 |
| simple | 0.32 |
| smart | 0.29 |
| good | 0.24 |
| accurate | 0.16 |
| changed | 0.73 |
| used by search engines | 0.68 |
| used by google | 0.61 |
| based | 0.38 |
| improved | 0.29 |
| used by bing | 0.29 |
| guarded | 0.25 |
| adjusted | 0.25 |
| used to provide prelimi… | 0.25 |
| kept under wrap | 0.16 |
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